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two-dimensional superconductors with intrinsic p-wave pairing or nontrivial band topology

Science China(Physics,Mechanics & Astronomy) 2023年第6期66卷 53-73页

作者： Wei Qin Jiaqing Gao Ping Cui Zhenyu Zhang International Center for Quantum Design of Functional Materials(ICQD) Hefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Department of Physics The University of Texas at AustinAustin 78712USA

Over the past fifteen years,tremendous efforts have been devoted to realizing topological superconductivity in realistic materials and systems,predominately propelled by their promising application potentials in fault-tolerant quantum information *** this article,we attempt to give an overview on some of the main developments in this field,focusing in particular on two-dimensional crystalline superconductors that possess either intrinsic p-wave pairing or nontrivial band *** first classify the three different conceptual schemes to achieve topological superconductor(TSC),enabled by real-space superconducting proximity effect,reciprocal-space superconducting proximity effect,and intrinsic *** the first scheme has so far been most extensively explored,the subtle difference between the other two remains to be fully *** then move on to candidate intrinsic or p-wave superconductors,including Sr2Ru O4,UTe2,Pb3Bi,and graphene-based *** TSC systems that rely on proximity effects,the emphases are mainly on the coexistence of superconductivity and nontrivial band topology,as exemplified by transition metal dichalcogenides,cobalt pnictides,and stanene,all in monolayer or few-layer *** review completes with discussions on the three dominant tuning schemes of strain,gating,and ferroelectricity in acquiring one or both essential ingredients of the TSC,and optimizations of such tuning capabilities may prove to be decisive in our drive towards braiding of Majorana zero modes and demonstration of topological qubits.

关键词： topological superconductivity p-wave pairing proximity effects two-dimensional crystalline superconductors

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