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Joanna Helena Kuczynska, S. C. Hopkins, Carmine Senatore and T. Boutboul
IEEE transactions on applied superconductivity 35 5, 6000306, 1-6 (2025)
Archive ouverte UNIGEMarta Brzezińska, Sergii Grytsiuk, Malte Rösner, Marco Gibertini and Louk Rademaker
2D materials 12 1, 015003 (2025)
Recent experiments in twisted bilayer transition-metal dichalcogenides have revealed a variety of strongly correlated phenomena. To theoretically explore their origin, we combine here ab initio calculations with correlated model approaches to describe and study many-body effects in twisted bilayer…
Archive ouverte UNIGEDirk Van Der Marel and Christophe Berthod
Newton 1 1, 100002 (2025)
Archive ouverte UNIGEDorota Iwona Walicka, Olivier Blacque, Tomasz Klimczuk and Fabian von Rohr
Journal of physics. Condensed matter 37 4, 045704 (2025)
We report on the structure and the superconducting properties of 9-electron 111 compounds with honeycomb layers, namely SrGaGe, SrAlGe, and the SrGa1-xAl x Ge solid solution. By means of single-crystal x-ray diffraction we show that, on one hand, SrGaGe crystallizes into the…
Archive ouverte UNIGEKai Roeseler, Catherine Witteveen, Céline Besnard, Vladimir Pomjakushin, Harald O Jeschke and Fabian von Rohr
Journal of materials chemistry. A (2025)
We herein report on a fast and convenient soft-chemical synthesis approach towards large 1T-CrTe2 van-der-Waals crystals. This compound is formed X-ray diffraction pure, with a complete conversion within just over 2 h from flux-grown LiCrTe2 crystals using diluted acids. Due…
Archive ouverte UNIGEAndreas Ørsted, Alessandro Scarfato, Céline Barreteau, Enrico Giannini and Christoph Renner
Nano letters 25, acs.nanolett.4c06377, 1729-1735 (2025)
Tunable electronic properties in transition metal dichalcogenides (TMDs) are essential to further their use in device applications. Here, we present a comprehensive scanning tunneling microscopy and spectroscopy study of a doping-induced charge density wave (CDW) in semiconducting bulk…
Archive ouverte UNIGEFélix Eder, Catherine Witteveen, Enrico Giannini and Fabian von Rohr
Journal of the American Chemical Society, 4c13545 (2025)
Layered delafossite-type compounds and related transition metal dichalcogenides, characterized by their triangular net structures, serve as prototypical systems for exploring the intricate interplay between crystal structure and magnetic behavior. Herein, we report on the discovery of the compound…
Archive ouverte UNIGEGianmarco Bovone, Florin Buta, Francesco Lonardo, Marco Bonura, C. N. Borca, T. Huthwelker, S.c. Hopkins, A. Ballarino, T. Boutboul and Carmine Senatore
IEEE transactions on applied superconductivity 34 3, 6000205 (2024)
Internal oxidation can achieve significantly enhanced Jc in Nb 3 Sn wires, but the mechanism of oxygen transport and oxide precipitation is not fully understood. Our investigation employs X-ray Absorption Near-Edge Structure (XANES) spectroscopy, revealing insights into the…
Archive ouverte UNIGEJung-Bin Song, Xavier Chaud, François Debray, Kévin Paillot, Philippe Fazilleau, Thibault Lécrevisse, Thomas Herrmannsdörfer, Carmine Senatore, Marc Dhallé and Anis Smara
IEEE transactions on applied superconductivity 34 5 (2024)
Archive ouverte UNIGEEdoardo Zatterin, Petr Ondrejkovic, Louis Bastogne, Céline Lichtensteiger, Ludovica Tovaglieri, Daniel A. Chaney, Alireza Sasani, Tobias Schülli, Alexei Bosak, Steven Leake, Pavlo Zubko, Philippe Ghosez, Jirka Hlinka, Jean-Marc Triscone and Marios Hadjimichael
Physical review. X 14 4, 041052 (2024)
The observation of unexpected polarization textures such as vortices, skyrmions, and merons in various oxide heterostructures has challenged the widely accepted picture of ferroelectric domain walls as being Ising-like. Bloch components in the 180° domain walls of PbTiO 3 have recently been…
Archive ouverte UNIGECelia Lucas Esparseil, Pablo Cayado Llosa, Hannes Rijckaert, Konstantina Konstantopoulou, Davide Nardelli and Carmine Senatore
Superconductor science and technology 37 12, 125014 (2024)
The process to obtain a superconducting joint between Coated Conductors (CCs) involves the simultaneous application of temperature and transverse compressive pressure to promote the joining of the two adjacent RE BCO layers. We performed experiments to simulate this procedure by subjecting samples…
Archive ouverte UNIGELoïc Musy
Thèse, 149 (2024)
Cette thèse explore, à l’aide de la microscopie à force atomique (AFM), le comportement des charges de surface sur les ferroélectriques, et la manière dont l’eau réagit selon l’orientation de la polarisation. En complément des techniques AFM, des développements matériels (contrôleur…
Archive ouverte UNIGEThibaut Divoux, Elisabeth Agoritsas, Stefano Aime, Catherine Barentin, Jean-Louis Barrat, Roberto Benzi, Ludovic Berthier, Dapeng Bi, Giulio Biroli, Daniel Bonn, Philippe Bourrianne, Mehdi Bouzid, Emanuela Del Gado, Hélène Delanoë-Ayari, Kasra Farain, Suzanne Fielding, Matthias Fuchs, Jasper van der Gucht, Silke Henkes, Maziyar Jalaal, Yogesh M Joshi, Anaël Lemaître, Robert L Leheny, Sébastien Manneville, Kirsten Martens, Wilson C K Poon, Marko Popović, Itamar Procaccia, Laurence Ramos, James A Richards, Simon Rogers, Saverio Rossi, Mauro Sbragaglia, Gilles Tarjus, Federico Toschi, Véronique Trappe, Jan Vermant, Matthieu Wyart, Francesco Zamponi and Davoud Zare
Soft matter 20 35, 6868-6888 (2024)
Soft amorphous materials are viscoelastic solids ubiquitously found around us, from clays and cementitious pastes to emulsions and physical gels encountered in food or biomedical engineering. Under an external deformation, these materials undergo a noteworthy transition from a solid to a liquid…
Archive ouverte UNIGEFengrui Yao, Dario Rossi, Ivo Antoniev Gabrovski, Volodymyr Multian, Nelson Hua, Kenji Watanabe, Takashi Taniguchi, Marco Gibertini, Ignacio Gutierrez Lezama, Louk Rademaker and Alberto Morpurgo
Nature communications 15 1, 10377 (2024)
Interfaces between twisted 2D materials host a wealth of physical phenomena originating from the long-scale periodicity associated with the resulting moiré structure. Besides twisting, an alternative route to create structures with comparably long-or even longer-periodicities is inducing a…
Archive ouverte UNIGEWaseem Akbar, Andrzej Biborski, Louk Rademaker and Michał Zegrodnik
Physical review. B 110 6, 064516 (2024)
We investigate strong coupling topological superconductivity in twisted moiré bilayer WSe2. Our approach is based on an effective t-J model with displacement-field-dependent complex hoppings, which is treated with the variational Gutzwiller projection method. The calculated phase diagram contains …
Archive ouverte UNIGEGiacomo Arturo Maria Morpurgo, Louk Rademaker, Christophe Berthod and Thierry Giamarchi
Physical review research 6 1, 013112 (2024)
We study the Hall constant in a homogeneous two-dimensional fluid of correlated electrons immersed in a perpendicular magnetic field, with special focus on the regime of low carrier density. The model consists of a one-band tight-binding model and a momentum-independent causal self-energy,…
Archive ouverte UNIGEZhe Wang, Catalin-Mihai Halati, Jean-Sébastien Bernier, Alexey Ponomaryov, Denis I Gorbunov, Sandra Niesen, Oliver Breunig, J Michael Klopf, Sergei Zvyagin, Thomas Lorenz, Alois Loidl and Corinna Kollath
Nature 631 8022, 760-764 (2024)
Stable composite objects, such as hadrons, nuclei, atoms, molecules and superconducting pairs, formed by attractive forces are ubiquitous in nature. By contrast, composite objects stabilized by means of repulsive forces were long thought to be theoretical constructions owing to their fragility in…
Archive ouverte UNIGEHepeng Yao, Luca Tanzi, Laurent Sanchez-Palencia, Thierry Giamarchi, Giovanni Modugno and Chiara D'Errico
Physical Review Letters 133 12, 123401 (2024)
Disorder or quasidisorder is known to favor localization in many-body Bose systems. Here, in contrast, we demonstrate an anomalous delocalization effect induced by incommensurability in quasiperiodic lattices. Loading ultracold atoms in two shallow periodic lattices with equal amplitude and either…
Archive ouverte UNIGEGiacomo Arturo Maria Morpurgo and Thierry Giamarchi
Physical Review Research 6 2, 023291 (2024)
We study the competition between disorder and singlet superconductivity in a quasi-one-dimensional (1D) system. We investigate the applicability of the Anderson theorem, namely that time-reversal conserving (nonmagnetic) disorder does not impact the critical temperature, by opposition to…
Archive ouverte UNIGEYanliang Guo, Hepeng Yao, Sudipta Dhar, Lorenzo Pizzino, Milena Horvath, Thierry Giamarchi, Manuele Landini and Hanns-Christoph Nägerl
Science Advances 10 7, eadk6870 (2024)
Cold atomic gases provide a remarkable testbed to study the physics of interacting many-body quantum systems. Temperatures are necessarily nonzero, but cooling to the ultralow temperatures needed for quantum simulation purposes or even simply measuring the temperatures directly on the system can…
Archive ouverte UNIGEYanliang Guo, Hepeng Yao, Satwik Ramanjanappa, Sudipta Dhar, Milena Horvath, Lorenzo Pizzino, Thierry Giamarchi, Manuele Landini and Hanns-Christoph Nägerl
Nature Physics 20 6, 934-938 (2024)
Dimensionality plays an essential role in determining the nature and properties of a physical system. This is particularly evident in quantum systems, where interactions and fluctuations are enhanced in lower dimensions, leading to various different quantum effects. Here we show that strongly…
Archive ouverte UNIGEPavel E Dolgirev, Ilya Esterlis, Alexander A Zibrov, Mikhail D Lukin, Thierry Giamarchi and Eugene Demler
Physical Review Letters 132 24, 246504 (2024)
We propose local electromagnetic noise spectroscopy as a versatile and noninvasive tool to study Wigner crystal phases of strongly interacting two-dimensional electronic systems. In-plane imaging of the local noise is predicted to enable single-site resolution of the electron crystal when the…
Archive ouverte UNIGEJoao Dos Santos Ferreira, Zizhuo Tony Jin, Jochen Mannhart, Thierry Giamarchi and Michele Filippone
Physical Review Letters 132 13, 136301 (2024)
We study noninteracting fermionic systems undergoing continuous monitoring and driven by biased reservoirs. Averaging over the measurement outcomes, we derive exact formulas for the particle and heat flows in the system. We show that these currents feature competing elastic and inelastic…
Archive ouverte UNIGELorenzo Gotta and Thierry Giamarchi
Physical Review B 110 16, 165116 (2024)
We consider a linearly dispersing quantum impurity interacting through a contact density-density term with a one-dimensional (1D) superfluid described by the Tomonaga-Luttinger liquid theory. Using a linked-cluster expansion we characterize the impurity dynamics by calculating approximate…
Archive ouverte UNIGEAnas El Hamdi, Artem Levchuk, Cosimo Gorini, Margherita Boselli, Vincent Juvé, Tadele Orbula Otomalo, Gwenaëlle Vaudel, Stefano Gariglio, Pascal Ruello, Jean-Yves Chauleau and Michel Viret
Physical review. B 110 5, 054412 (2024)
Archive ouverte UNIGESeongwoo Cho, Iaroslav Gaponenko, Kumara Cordero-Edwards, Jordi Barceló-Mercader, Irene Arias, Daeho Kim, Céline Lichtensteiger, Jiwon Yeom, Loïc Musy, Hyunji Kim, Seung Min Han, Gustau Catalan, Patrycja Paruch and Seungbum Hong
Nature communications 15 387 (2024)
Switchable tribological properties of ferroelectrics offer an alternative route to visualize and control ferroelectric domains. Here, we observe the switchable friction and wear behavior of ferroelectrics using a nanoscale scanning probe—down domains have lower friction coefficients and show…
Archive ouverte UNIGECarmine Senatore, Marco Bonura and Tommaso Bagni
Superconductor science and technology 37 11, 115013 (2024)
REBa2Cu3O 7− x (REBCO) tapes produced by leading manufacturers were tested at UNIGE to characterize the dependence of the critical current on temperature, field intensity and orientation. This measurement campaign was carried out in the frame of international…
Archive ouverte UNIGELucia Varbaro, Lukas Alexander Korosec, Chih-Ying Hsu, Duncan T.L. Alexander, Nicolas Jaouen and Jean-Marc Triscone
APL materials 12 8, 081120 (2024)
Rare-earth nickelates (chemical formula RNiO3, R being a rare-earth cation) display a temperature-dependent metal-to-insulator transition (MIT) together with a breathing distortion of the NiO6 octahedra units at a temperature ranging from 0 to 600 K depending on the size of…
Archive ouverte UNIGEJulia Issing
Thèse (2024)
Thinning a bulk material down to a few atomic layers or even to a monolayer influences its physical properties considerably. Such two-dimensional materials can also be used to engineer new correlated phases by stacking them on top of each other. In the present thesis, I present my work on twisted…
Archive ouverte UNIGEPablo Cayado Llosa and Jens Hänisch
High Entropy Alloys – Composition and Microstructure Design (2024)
High-entropy alloys are a rapidly evolving field of materials research and have gained increasing attention in recent years. Characterized by their multicomponent compositions, they were originally created by mixing a multitude of metallic elements and expanded the idea of traditional alloy design, …
Archive ouverte UNIGEP. Reale, V. Pinto, Pablo Cayado Llosa, G. Celentano, A. Angrisani Armenio, A. Rufoloni, A. Santoni and F. D’Acapito
Journal of alloys and compounds 983, 173921 (2024)
Gd-YBa2Cu3O7-δ (Gd-YBCO) thin films with 10 mol% and 20 mol% excess-Gd concentration with respect to Y were investigated at the Gd L3 and Y K core absorption edges by EXAFS spectroscopy with the aim of determining the local structure of the Gd…
Archive ouverte UNIGERyoichiro Hayasaka, Jens Hänisch and Pablo Cayado Llosa
Journal of open research software 12 1, 2 (2024)
Definitive Screening Design (DSD) is a powerful design of experiment technique employed to find significant factors (parameters) and optimize the factor levels in many experiments of different fields. However, making its design and analyzing the obtained results usually requires expensive software…
Archive ouverte UNIGESandy Adhitia Ekahana, Y. Soh, Anna Tamai, Daniel Gosálbez-Martínez, Mengyu Yao, Andrew Scott Hunter, Wenhui Fan, Yihao Wang, Junbo Li, Armin Kleibert, C. A. F. Vaz, Junzhang Ma, Yimin Xiong, Oleg V. Yazyev, Felix Baumberger, Ming Shi and Gabriel Aeppli
Nature 627, 67-72 (2024)
Ordinary metals contain electron liquids within well-defined ‘Fermi’ surfaces at which the electrons behave as if they were non-interacting. In the absence of transitions to entirely new phases such as insulators or superconductors, interactions between electrons induce scattering that is…
Archive ouverte UNIGEI.Yu. Zavaliy, I.v. Koval'chuck, R.v. Denys, Radovan Cerny, V. Pecharsky and P. Zavalij
Journal of alloys and compounds 980, 173531 (2024)
Archive ouverte UNIGEYong Hu, Junzhang Ma, Yinxiang Li, Yuxiao Jiang, Dariusz Jakub Gawryluk, Tianchen Hu, Jérémie Teyssier, Volodymyr Multian, Zhouyi Yin, Shuxiang Xu, Soohyeon Shin, Igor Plokhikh, Xinloong Han, Nicholas C. Plumb, Yang Liu, Jia-Xin Yin, Zurab Guguchia, Yue Zhao, Andreas P. Schnyder, Xianxin Wu, Ekaterina Pomjakushina, M. Zahid Hasan, Nanlin Wang and Ming Shi
Nature communications 15 1 (2024)
Charge density wave (CDW) orders in vanadium-based kagome metals have recently received tremendous attention, yet their origin remains a topic of debate. The discovery of ScV 6 Sn 6 , a bilayer kagome metal featuring an intriguing $$\sqrt{3}\times\sqrt{3}\times3$$ 3 × 3 × 3…
Archive ouverte UNIGEKévin Bredillet, Florian Riporto, Tianhao Guo, Ameni Dhouib, Volodymyr Multian, Virginie Monnier, Paulí Figueras Llussà, Sandrine Beauquis, Luigi Bonacina, Yannick Mugnier and Ronan Le Dantec
Nanoscale (2024)
Preparation from the aqueous alkoxide route of doped and co-doped lithium niobate nanocrystals with Er 3+ and Yb 3+ ions, and detailed investigations of their optical properties are presented in this comprehensive…
Archive ouverte UNIGERobin Lefèvre, Félix Eder and Fabian von Rohr
Helvetica Chimica Acta 107 4, e202400018 (2024)
Through the application of synthesis via molten indium flux, we have been able to expand the ternary Sc−Mn−Si system and the quaternary Sc−Mn−Al−Si system. Specifically, we report on five previously unknown chemical compounds, namely β-ScMnSi2, Sc4+xMn4Si7–2x, Sc2Mn4Si5, Sc2Mn3Si4, and …
Archive ouverte UNIGEArpad Pasztor, Ishita Pushkarna and Christoph Renner
2D materials 11 3, 035017 (2024)
Geometric phase analysis (GPA) is a widely used technique for extracting displacement and strain fields from scanning probe images. Here, we demonstrate that GPA should be implemented with caution when several fundamental lattices contribute to the image, in particular in twisted heterostructures…
Archive ouverte UNIGETejas Parasram Singar
Thèse, 169 (2024)
High-temperature superconductors have been extensively studied over the past four decades. Much progress has been made in terms of understanding the basic fundamental mechanisms that lead to exceptionally high transition temperatures as compared to conventional superconductors. However, many…
Archive ouverte UNIGECarlota Pereira de Alemida Carlos, Stewart Leith, Guillaume Rosaz, Stephan Pfeiffer and Carmine Senatore
Vacuum 227, 113354 (2024)
Cost efficiency and sustainability are critical challenges for future accelerator machines. Nb-coated Cu (Nb/Cu) superconducting radiofrequency (SRF) accelerating cavities, while requiring R&D to meet high acceleration gradient performance standards, show potential for addressing these challenges….
Archive ouverte UNIGETommaso Bagni, Ciro Calzolaio, Gianmarco Bovone, José Ferradas Troitino, Christian Barth, A. Ballarino and Carmine Senatore
Superconductor science and technology 37 9, 095013 (2024)
Future high-field magnets for particle accelerators hinge on the crucial development of advanced Nb3Sn wires engineered to withstand the large stresses generated during magnet assembly and operation. The superconducting properties of Nb3Sn enable the design of compact…
Archive ouverte UNIGEAntonio Bianchi, Marco Bonura, Carlota Pereira de Alemida Carlos, Stewart Leith, Guillaume Rosaz, Carmine Senatore and Walter Venturini Delsolaro
Superconductor science and technology 37 8, 085005 (2024)
Niobium-coated copper radio-frequency cavities are cost-effective alternatives to bulk niobium cavities, given the lower material costs of copper substrates and their operation in liquid helium at around 4.2 K. However, these cavities historically exhibited a gradual degradation in performance…
Archive ouverte UNIGEJiarui Li, Robert J. Green, Claribel Dominguez Ordonez, Abraham Levitan, Yi Tseng, Sara Catalano, Jennifer Fowlie, Ronny Sutarto, Fanny Rodolakis, Lucas Korol, Jessica L. McChesney, John W. Freeland, Dirk Van Der Marel, Marta Gibert and Riccardo Comin
Nature communications 15 1, 7427 (2024)
Archive ouverte UNIGEGreta Segantini, Chih-Ying Hsu, Willem Rischau, Patrick Blah, Mattias Matthiesen, Stefano Gariglio, Jean-Marc Triscone, Duncan T L Alexander and Andrea Caviglia
Nano letters, acs.nanolett.4c02913 (2024)
Archive ouverte UNIGERalph Adam Yap Bulanadi
Thèse, 222 (2024)
We here leverage scanning probe microscopy, sensitive to both structural and functional properties of ferroelectric domains, in order to change, measure, and characterise the variety of transitions (and transition-like behaviours in the highly nonlinear dynamics accompanying polarisation reversal…
Archive ouverte UNIGEAlessandro Scarfato, Arpad Pasztor, Lihuan Sun, Ivan Maggio-Aprile, Vincent Pasquier, Tejas Parasram Singar, Andreas Ørsted, Ishita Pushkarna, Marcello Spera, Enrico Giannini and Christoph Renner
Physical review. B 110 8, 085109 (2024)
Archive ouverte UNIGEL. Bottura, C. Accettura, N. Amemiya, B. Auchmann, J.s. Berg, A. Bersani, A. Bertarelli, F. Boattini, B. Bordini, P. Borges de Sousa, M. Breschi, B. Caiffi, X. Chaud, F. Debray, A. Dudarev, M. Eisterer, S. Fabbri, S. Farinon, P. Ferracin, H. De Gersem, A. Kario, A. Kolehmainen, J. Kosse, J. Lorenzo Gomez, R. Losito, S. Mariotto, M. Mentink, T. Mulder, R. Musenich, D. Novelli, T. Ogitsu, M. Palmer, J. Pavan, H. Piekarz, A. Portone, L. Quettier, E. Rochepault, L. Rossi, T. Salmi, H. Schneider-Muntau, Carmine Senatore, M. Statera, H.h.j. Ten Kate, P. Testoni, G. Vallone, A. Verweij, R. Van Weelderen, M. Wozniak, A. Yamamoto, Y. Yang, Y. Zhai and A. Zlobin
IEEE transactions on applied superconductivity 34 5 (2024)
We describe the magnet challenges for a Muon Collider, an exciting option considered for the future of particle physics at the energy frontier. Starting from the comprehensive work performed by the US Muon Accelerator Program, we have reviewed the performance specifications dictated by beam physics …
Archive ouverte UNIGEC. W. Nicholson, F. Petocchi, B. Salzmann, Catherine Witteveen, M. Rumo, G. Kremer, O. Ivashko, Fabian von Rohr, P. Werner and C. Monney
Physical review. B 109 3, 035167 (2024)
Archive ouverte UNIGEAndrew Scott Hunter, C. Putzke, Iaroslav Gaponenko, Anna Tamai, Felix Baumberger and P. J. W. Moll
Review of scientific instruments 95, 033905 (2024)
Our understanding of quantum materials is commonly based on precise determinations of their electronic spectrum by spectroscopic means, most notably angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling microscopy (STM). Both require atomically clean and flat crystal surfaces…
Archive ouverte UNIGEE. De Matteis, A. Ballarino, D. Barna, A. Carloni, A. Echeandia, G. Kirby, T. Lecrevisse, J. Lucas, S. Mariotto, J. van Nugteren, M. Prioli, L. Rossi, Carmine Senatore, M. Sorbi, S. Sorti, M. Statera, F. Toral and R.u. Valente
IEEE transactions on applied superconductivity 34 5, 4402505 (2024)
The European project IFAST’s WP8 Innovative Superconducting Magnets aims to develop the technology of Canted Cosine Theta (CCT) magnets wound with High-Temperature Superconductors (HTS). Superconducting magnets could lower the size and cost of synchrotrons and gantries for research and hadron…
Archive ouverte UNIGEFrancesco Lonardo, Gianmarco Bovone, Florin Buta, Marco Bonura, Tommaso Bagni, B. Medina-Clavijo, A. Ballarino, S. C. Hopkins, T. Boutboul and Carmine Senatore
IEEE transactions on applied superconductivity 34 5, 6000305 (2024)
We evaluated various heat treatments (HT) for maximizing the Nb 3 Sn layer thickness while retaining a refined grain microstructure in low filament count internal-Sn Nb 3 Sn Rod-In-Tube wires with internally oxidized nanoparticles. These wires were manufactured in our…
Archive ouverte UNIGEAna I. F. Tresguerres-Mata, Christian Lanza, Javier Taboada Gutierrez, Joseph. R. Matson, Gonzalo Álvarez-Pérez, Masahiko Isobe, Aitana Tarazaga Martín-Luengo, Jiahua Duan, Stefan Partel, María Vélez, Javier Martín-Sánchez, Alexey Y. Nikitin, Joshua D. Caldwell and Pablo Alonso-González
Nature communications 15 1, 2696 (2024)
Polariton canalization is characterized by intrinsic collimation of energy flow along a single crystalline axis. This optical phenomenon has been experimentally demonstrated at the nanoscale by stacking and twisting van der Waals (vdW) layers of α-MoO3, by combining α-MoO3…
Archive ouverte UNIGEElisabeth Agoritsas and Jonathan Barés
Physical review. E 109 4, L042901 (2024)
Oscillatory-driven amorphous materials forget their initial configuration and converge to limit cycles. Here we investigate this memory loss under a nonquasistatic drive in a minimal model system, with quenched disorder and memory encoded in a spatial pattern, where oscillating protocols are…
Archive ouverte UNIGERitu Gupta, Catherine Witteveen, Debarchan Das, Fabian von Rohr and Rustem Khasanov
Physical review. B 109 13, 134507 (2024)
We report on the microscopic superconducting properties of the Dirac semimetal PdTe2. In this study, we have focused on mosaic crystals of PdTe2, and used detailed zero-field and transverse-field muon-spin relaxation/rotation (μSR), ac-magnetic susceptibility, and resistivity measurements to…
Archive ouverte UNIGEWillem Rischau, Artem Korshunov, Volodymyr Multian, Sara Almudena Lopez Paz, Chubin Huang, Lucia Varbaro, Jérémie Teyssier, Yoav Kalcheim, Stefano Gariglio, Alexei Bosak, Jean-Marc Triscone and Javier del Valle
Physical review. B, Condensed matter 109, 094122 (2024)
Archive ouverte UNIGEAnastasiia Lukovkina, Sara Almudena Lopez Paz, Céline Besnard, Laure Guenee, Fabian von Rohr and Enrico Giannini
Chemistry of materials 36 12, 6237-6245 (2024)
The structurally related compounds NiI2 and CoI2 are multiferroic van der Waals materials in which helimagnetic orders exist simultaneously with electric polarization. Here, we report on the evolution of the crystal structure and of the magnetic properties across solid…
Archive ouverte UNIGERuijuan Xu, Iris Crassee, Hans A. Bechtel, Yixi Zhou, Adrien Bercher, Lukas Alexander Korosec, Willem Rischau, Jérémie Teyssier, Kevin J. Crust, Yonghun Lee, Stephanie N. Gilbert Corder, Jiarui Li, Jennifer A. Dionne, Harold Y. Hwang, Alexey Kuzmenko and Yin Liu
Nature communications 15 1, 4743 (2024)
Recent theoretical studies have suggested that transition metal perovskite oxide membranes can enable surface phonon polaritons in the infrared range with low loss and much stronger subwavelength confinement than bulk crystals. Such modes, however, have not been experimentally observed so far….
Archive ouverte UNIGEWillem Rischau, Stefano Gariglio, Jean-Marc Triscone and Javier del Valle
Physical review applied 22 1, 014021 (2024)
Many correlated oxides feature an insulator-to-metal transition as the temperature is increased. In thin films, this transition can be electrically induced by localized Joule heating, resulting in volatile resistive switching. Considering the importance of thermal effects, the thermal conductivity…
Archive ouverte UNIGEJulian Fritzsch
Thèse (2024)
The energy sector is the largest contributor to global greenhouse gas emissions. Therefore, to effectively combat climate change, conventional fossil-fueled power generation is being replaced by power generation from renewable energy sources, such as solar panels or wind farms. This energy…
Archive ouverte UNIGELucia Varbaro, Bernat Mundet Bolos, Subhadeep Bandyopadhyay, Claribel Dominguez Ordonez, Jennifer Fowlie, Lukas Alexander Korosec, Chih-Ying Hsu, Duncan T. L. Alexander, Philippe Ghosez and Jean-Marc Triscone
APL materials 12 3, 031104 (2024)
Heterostructures consisting of SmNiO3 and NdNiO3 alternating layers with additional LaAlO3 spacer layers were grown and fully characterized by means of x-ray diffraction, atomic force microscopy, and scanning transmission electron microscopy. A change in the orientation of the orthorhombic…
Archive ouverte UNIGEAmirreza Hemmatzade
Thèse (2024)
Frustration can lead to a disordered ground state with a macroscopic degeneracy. A structural and/or magnetic ice system is one in which this frustration can be described by simple local rules describing the configuration of a tetrahedron – the so-called ice rule. In the case of water-ice this rule …
Archive ouverte UNIGEWeiwei Luo, Jiang Fan, Alexey Kuzmenko, Wei Cai and Jingjun Xu
Physical review. B 110 3, 035408 (2024)
Archive ouverte UNIGEFabian von Rohr
Chimia 78 12, 855-861 (2024)
In this perspective, we will discuss the impact of some of the most recent advancements in materials discovery, particularly focusing on the role of robotics, artificial intelligence, and self-driving laboratories, as well as their implications for the Swiss research landscape. While it seems…
Archive ouverte UNIGEXiaohanwen Lin, Fan Wu, Sara Almudena Lopez Paz, Fabian von Rohr, Marco Gibertini, Ignacio Gutierrez Lezama and Alberto Morpurgo
Physical review research 6 1, 013185 (2024)
We investigate the c -direction conduction in CrSBr in the linear regime, which is not accessible in other van der Waals (vdW) magnetic semiconductors, because of the unmeasurably low current. The resistivity, which is 10 8 − 10 11 times larger than in the a and b directions, exhibits magnetic…
Archive ouverte UNIGEDebarchan Das, KeYuan Ma, Jan Jaroszynski, Vahid Sazgari, Tomasz Klimczuk, Fabian von Rohr and Zurab Guguchia
Physical review. B 110 17, 174507 (2024)
Here we report muon spin rotation ( μ SR ) experiments on the temperature and field dependence of the effective magnetic penetration depth λ ( T ) in the η -carbide-type suboxide Ti 4 Ir 2 O , a superconductor with a considerably high upper critical field. The temperature dependence of λ ( T ) …
Archive ouverte UNIGEC. W. Nicholson, M. D. Watson, A. Pulkkinen, M. Rumo, G. Kremer, K. Y. Ma, Fabian von Rohr, C. Cacho and C. Monney
Physical review. B 110 20, 205123 (2024)
Competing interactions in low-dimensional materials can produce nearly degenerate electronic and structural phases. We investigate structural phase transitions in layered IrTe 2 for which a number of potential transition mechanisms have been postulated. The spatial coexistence of multiple phases…
Archive ouverte UNIGES. Galeski, K. Araki, O. K. Forslund, R. Wawrzyńczak, H. F. Legg, P. K. Sivakumar, U. Miniotaite, F. Elson, M. Månsson, Catherine Witteveen, Fabian von Rohr, A. Q. R. Baron, D. Ishikawa, Q. Li, G. Gu, L. X. Zhao, W. L. Zhu, G. F. Chen, Y. Wang, S. S. P. Parkin, D. Grobunov, S. Zherlitsyn, B. Vlaar, D. H. Nguyen, S. Paschen, P. Narang, C. Felser, J. Wosnitza, T. Meng, Y. Sassa, S. A. Hartnoll and J. Gooth
Physical review. B 110 12, L121103 (2024)
The electron-phonon interaction is in many ways a solid state equivalent of quantum electrodynamics. Being always present, the e-p coupling is responsible for the intrinsic resistance of metals at finite temperatures, making it one of the most fundamental interactions present in solids. In typical…
Archive ouverte UNIGELifen Shi, Keyuan Ma, Binbin Ruan, Ningning Wang, Jun Hou, Pengfei Shan, Pengtao Yang, Jianping Sun, Genfu Chen, Zhian Ren, Fabian von Rohr, Bosen Wang and Jinguang Cheng
Physical review. B 110 21, 214520 (2024)
We revised normal-state and superconducting properties of an alloy superconductor Nb4Rh2C1−𝛿 through electrical transport, magnetic susceptibility, and specific heat. Our results reveal that it is a Pauli paramagnetic bad metal, a strongly coupled superconductor with specific heat…
Archive ouverte UNIGEMichael Straub, Francesco Petocchi, Catherine Witteveen, F. B. Kugler, Andrew Scott Hunter, Yann Alexanian, Gianmarco Gatti, Salony Mandloi, C. Polley, G. Carbone, J. Osiecki, Fabian von Rohr, Antoine Georges, Felix Baumberger and Anna Tamai
Preprint (2024)
We study the electronic structure of bulk 1T-TaSe$_2$ in the charge density wave phase at low temperature. Our spatially and angle resolved photoemission (ARPES) data show insulating areas coexisting with metallic regions characterized by a chiral Fermi surface and moderately correlated…
Archive ouverte UNIGEYann Alexanian, A. de la Torre, Siobhan Mckeown Walker, Michael Straub, Gianmarco Gatti, Andrew Scott Hunter, Salony Mandloi, Edoardo Cappelli, Sara Ricco, Flavio Yair Bruno, M. Radovic, N. C. Plumb, M. Shi, J. Osiecki, C. Polley, T. K. Kim, P. Dudin, M. Hoesch, R. S. Perry, Anna Tamai and Felix Baumberger
Preprint (2024)
The fate of the Fermi surface in bulk electron-doped Sr$_{2}$IrO$_{4}$ remains elusive, as does the origin and extension of its pseudogap phase. Here, we use high-resolution angle-resolved photoelectron spectroscopy (ARPES) to investigate the electronic structure of Sr$_{2-x}$La$_{x}$IrO$_{4}$ up…
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