Gate-Defined Topological Josephson Junctions in Bernal Bilayer Graphene

被引：9

作者：

Xie Y.-M. ^{[1
,2
,3
]}

Lantagne-Hurtubise É. ^{[2
,3
]}

Young A.F. ^{[4
]}

Nadj-Perge S. ^{[3
,5
]}

Alicea J. ^{[2
,3
]}

机构：

[1] Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong

[2] Department of Physics, California Institute of Technology, Pasadena, 91125, CA

[3] Institute for Quantum Information and Matter, California Institute of Technology, Pasadena, 91125, CA

[4] Department of Physics, University of California at Santa Barbara, Santa Barbara, 93106, CA

[5] T. J. Watson Laboratory of Applied Physics, California Institute of Technology, 1200 East California Boulevard, Pasadena, 91125, CA

来源：

Physical Review Letters | 2023年 / 131卷 / 14期

基金：

美国国家科学基金会;

关键词：

All Open Access; Green;

D O I：

10.1103/PhysRevLett.131.146601

中图分类号：

学科分类号：

摘要：

Recent experiments on Bernal bilayer graphene (BLG) deposited on monolayer WSe2 revealed robust, ultraclean superconductivity coexisting with sizable induced spin-orbit coupling. Here, we propose BLG/WSe2 as a platform to engineer gate-defined planar topological Josephson junctions, where the normal and superconducting regions descend from a common material. More precisely, we show that if superconductivity in BLG/WSe2 is gapped and emerges from a parent state with intervalley coherence, then Majorana zero-energy modes can form in the barrier region upon applying weak in-plane magnetic fields. Our results spotlight a potential pathway for internally engineered"topological superconductivity that minimizes detrimental disorder and orbital-magnetic-field effects. © 2023 American Physical Society."

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