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Conducting oxide interfaces

The emergence of novel physical properties at the interfaces between complex oxides has been attracting considerable interest since the discovery [1] of a (super)conducting state in structures made of a thin LaAlO3 layer grown on top of a SrTiO3 substrate, both nominally insulating compounds.

From the report of the superconducting ground state [2], LaAlO3/SrTiO3 heterostructures have been part of the scientific agenda of our group. Exploiting the potential of the field effect approach, we have tuned superconductivity, revealing a dome-like behaviour of the critical temperature with carrier density [3]. In the normal state, the analysis of the magneto-conductance uncovers a strong spin-orbit coupling [4], whose origin stems from a subtle balance between charge confinement and atomic spin-orbit interaction [5]. The strength and tunability of the spin-orbit coupling enables the operation of spin-charge conversion devices [6], an important effect for spintronic applications.

Left panel: Temperature behavior of the resistance at different back-gate voltages. By increasing the back-gate from -300 V to 320 V, the 2DES moves from a weak-localization regime to a superconducting phase. Right panel: Sheet resistance at 600 mK as a function of the back-gate plotted together with the superconducting transition temperature [3].

[1]. A. Ohtomo and H. Y. Hwang, Nature 427, (2004)

[2]. N. Reyren et al. Science 317, (2007)

[3]. A. Caviglia et al. Nature 456, (2008)

[4] A. D. Caviglia et al., Phys. Rev. Lett. 104, 126803 (2010)

[5] S. Gariglio et al., Rep. Prog. Phys. 82, 012501 (2018)

[6] J.-Y. Chauleau et al., European Physics Letters 116, 17006 (2016)


Main researchers

Adrien Waelchli, Clémentine Thibault, Stefano Gariglio


Our publications on this topic

M. Boselli et al.
Physical Review B 103, 075431 (2021)

G. Scheerer et al.
Condensed Matter 5, 60 (2020)

A. Gloter et al.
APL Materials 8, 041103 (2020)

M. Caputo et al.
Physical Review Materials 4, 035001 (2020)

Weiwei Luo et al.
Nature Communications 10, 2774 (2019)

Margherita Boselli
Ph.D. Thesis , (2019)

S. Gariglio et al.
Reports on Progress in Physics 82, 012501 (2018)

D. Li et al.
Advanced Science , 1800242 (2018)

D. F. Valentinis et al.
Phys. Rev. B 96, 094518 (2017)

Davide Valentinis
Ph.D. Thesis , (2017)

S. Gariglo et al.
The Oxford Handbook of Small Superconductors Pt. I,. Ch. 7, (2017)

Danfeng Li
Ph.D. Thesis , (2016)

J.-Y. Chauleau et al.
European Physics Letters 116, 17006 (2016)

S. Gariglio et al.
APL Materials 4, 060701 (2016)

I. Pallecchi et al.
Physical Review B 93, 195309 (2016)

M. Boselli et al.
Applied Physics Letters 108, 061604 (2016)

S Gariglio et al.
Journal of Physics: Condensed Matter 27, 283201 (2015)

W. Liu et al.
APL Materials 3, 062805 (2015)

Ilaria Pallecchi et al.
Nature Communications 6, 6678 (2015)

S. Gariglio et al.
Physica C: Superconductivity and its Applications , (2015)

A. Fête et al.
Appl. Phys. Lett. 106, 051604 (2015)

D.Stornaiuolo et al.
Phys. Rev. B 90, 235426 (2014)

A Fête et al.
New Journal of Physics 16, 112002 (2014)

Alexandre Fête
Ph.D. Thesis , (2014)

Danfeng Li et al.
APL Materials 2, 012102 (2014)

C. Cancellieri et al.
Physical Review Letters 110, 137601 (2013)

M. Salluzzo et al.
Advanced Materials , (2013)

D. Stornaiuolo et al.
Applied Physics Letters 101, 222601 (2012)

A. Fête et al.
Physical Review B 86, 201105(R) (2012)

A. Filippetti et al.
Physical Review B 86, 195301 (2012)

M.L. Reinle-Schmitt et al.
Nature Communications 3, 932 (2012)

C. Cancellieri et al.
Physical Review Letters 107, 056120 (2011)

Stefano Gariglio et al.
Physics Viewpoint 4, 59 (2011)

Stefano Gariglio and Jean-Marc Triscone
Comptes Rendus Physique 12, 591-599 (2011)

Pavlo Zubko et al.
Annual Review of Condensed Matter Physics 2, 141-165 (2011)

A. Sambri et al.
Applied Physics Letters 98, 12903 (2010)

A. D. Caviglia et al.
Physical Review Letters 105, 236802 (2010)

Andrea Caviglia
Ph.D. Thesis , (2010)

C. Cancellieri et al.
Europhysics Letters 91, 17004 (2010)

A. D. Caviglia et al.
Physical Review Letters 104, 126803 (2010)

I. Pallecchi et al.
Physical Review B 81, 085414 (2010)

Nicolas Reyren
Ph.D. Thesis , (2009)

T. Schneider et al.
Physical Review B 79, 184502 (2009)

S. Gariglio et al.
Journal of Physics: Condensed Matter 21, 164213 (2009)

N. Reyren et al.
Applied Physics Letters 94, 112506 (2009)

S. Thiel et al.
Physical Review Letters 102, 046809 (2009)

A. D. Caviglia et al.
Nature 456, 624 (2008)

N. Reyren et al.
Science 317, 1196 (2007)