A journal club on the broad topic of two-dimensional materials and interfaces

Next Talk

STM-switchable vortices hosting Majoranas

Christophe Berthod

2020-06-05 -- 13:00 -- Zoom

Abrikosov vortices hosting robust and well isolated zero-energy bound states have been recently found in FeTe$_{0.55}$Se$_{0.45}$, as reported by several different STM groups [1-3]. These vortices attract attention as the possible building blocks in a scenario of fault-tolerant quantum computing [4]. In this material, zero-energy bound states had been reported earlier in zero field close to Fe impurities [5] -- where finite-energy states are expected instead -- and remained unexplained, until it was proposed last year that a vortex spontaneously nucleates at the Fe impurity [6]. In this FLAT Club, I will present a spectacular recent experiment [arXiv:2001.07376], where this spontaneous vortex is switched on and off by using the STM tip to tune the exchange coupling with the impurity.

[1] Wang et al., Science 362, 333 (2018) [10.1126/science.aao1797]

[2] Machida et al., Nat. Mater. 18, 811 (2019) [10.1038/s41563-019-0397-1]

[3] Chen et al., arXiv:1909.01686 (2019)

[4] Ivanov, Phys. Rev. Lett. 86, 268 (2001) [10.1103/PhysRevLett.86.268]

[5] Yin et al., Nat. Phys. 11, 543 (2015) [10.1038/NPHYS3371]

[6] Jiang et al., Phys. Rev. X 9, 011033 (2019) [10.1103/PhysRevX.9.011033]



Past and Future Presentations


SPEAKER

TITLE

DATE

TIME

PLACE

Christophe Berthod

STM-switchable vortices hosting Majoranas

2020-06-05

13:00

Zoom

Margherita Boselli

Electronic phenomena at the LaAlO3/SrTiO3 interface: an overview

2020-05-22

13:00

Zoom Link to appear soon

Daniil Domaretskiy

Giant Stark splitting of an exciton in bilayer MoS2

2020-02-28

12:15

Auditoire Stückelberg

Gen Long

Magnetic Proximity Effect in van der Waals Heterostructures

2020-02-21

12:15

Auditoire Stückelberg

x

February holidays

2020-02-14

12:15

x

Louk Rademaker

Enhanced superconductivity in monolayer FeSe

2020-02-07

12:15

Auditoire Stückelberg

Nicolas Ubrig

Quantum light from Moiré trapped excitons

2020-01-31

12:15

Auditoire Stückelberg

Nicolas Ubrig

Quantum light from Moiré excitons

2020-01-31

12:15

Auditoire Stückelberg

x

Van der Waals meeting

2020-01-24

12:15

Freiburg

Tim Gazdic

Vortex spectroscopy with cuprate density waves

2020-01-17

12:15

Auditoire Stückelberg

Stefano Gariglio

High-temperature superconductivity in monolayer Bi2Sr2CaCu2O8+δ

2019-12-13

12:15

Auditoire Stückelberg

Alexey Kuzmenko

Scanning near-field optical microscopy of van der Waals materials

2019-12-06

12:15

Auditoire Stückelberg

Dumitru Dumcenco

Layered antiferromagnetic tritilurides

2019-11-29

12:15

Auditoire Stückelberg

Michele Filippone

A second take on vortex spectroscopy, but with topology and Majoranas

2019-11-22

12:15

Auditoire Stückelberg

Irène Cucchi

Observation of Moiré minibands with ARPES

2019-11-08

12:15

Auditoire Stückelberg

Christophe Berthod

Pizza, pancake, and spaghetti: A primer on vortex-core spectroscopy

2019-11-01

12:15

Auditoire Stückelberg

Alessandro Scarfato

Electronic correlations and symmetry breaking in MATBG at the nanoscale

2019-10-25

12:15

Room 102 - Science I

Louk Rademaker

Quantum Anomalous Hall effect in Twisted Bilayer Graphene

2019-10-11

12:15

Auditoire Stückelberg

David Soler Delgado

Chern insulator and Ferromagnetism in ABC trilayer graphene/hBN Moiré superlattices

2019-10-04

12:15

Auditoire Stückelberg

Marco Gibertini

Chiral phonons in two-dimensional materials

2019-09-27

12:15

Auditoire Stückelberg

Jean-Marie Poumirol

Plasmon-exciton coupling in Transition-Metal Dichalcogenides

2019-06-07

12:15

Room 102 - Science I

Hugo Henck

Quantum Anomalous Hall Effect (QAHE) in MnBi2Te4

2019-05-24

12:15

Auditoire Stückelberg

Simone Lisi

Twisted Bilayer Graphene on SiC

2019-05-17

12:15

Auditoire Stückelberg

Ivan Protopopov

Correlated states in Twisted Double Bilayer Graphene

2019-05-10

12:15

Room 102 - Science I

Nicolas Ubrig

Moiré Excitons and Proximity Effect on Excitons

2019-04-26

12:15

Auditoire Stückelberg

Ignacio Gutiérrez-Lezama

WTe2: a handful of exotic states!

2019-03-29

12:15

Room 102 - Science I

Árpád Pasztor

Presentation Renner's Group

2019-03-22

12:15

Room 102 - Science I

Michele Filippone

Quantum Hydrodynamics -- Predictions and Experiments

2019-03-15

12:15

Room 102 - Science I

March Meeting Break

2019-03-08

x

Marco Gibertini

Exploring magnetism in 2D materials

2019-03-01

12:15

Room 102 - Science I

Louk Rademaker

Latest developments in twisted bilayer graphene

2019-02-22

12:15

Auditoire Stückelberg



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