Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session W01: Topological Superconductivity by Design
3:00 PM–6:00 PM,
Thursday, March 7, 2024
Room: L100A
Sponsoring
Unit:
DMP
Chair: Andrew Yuan, Stanford University
Abstract: W01.00013 : Possible breaking of the Pauli limit in Sn1-xInxTe/III-V heterostructures*
5:48 PM–6:00 PM
Presenter:
Jiashu Wang
(University of Notre Dame)
Authors:
Jiashu Wang
(University of Notre Dame)
Logan S Riney
(University of Notre Dame)
Hao Li
(Purdue University)
Leonid P Rokhinson
(Purdue University)
Xinyu Liu
(University of Notre Dame)
Badih A Assaf
(University of Notre Dame)
Here we report transport studies of Sn1-xInxTe/(Ga,In)(As,Sb), grown by molecular beam epitaxy. Band bending between two layers causes a depletion region at the interface. By varying the composition of (Ga,In)(As,Sb), we are able to tune the strength of band bending and modify the superconducting properties of Sn1-xInxTe. Interestingly, we have observed a breaking of the Pauli limit in Sn0.7In0.3Te/Ga0.52In0.48Sb heterostructure. Meanwhile, Pauli limit is preserved in Sn0.7In0.3Te layers grown on wide-gap BaF2 substrate, where no band bending occurs. The result indicates the existence of unconventional superconductivity emerging on Sn1-xInxTe in the 2D limit. Our work has also shown a possible way of engineering the superconducting properties by band bending.
*Research supported by DMR-1905277, and partly by CRDF.
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