Proximity-induced two-dimensional superconductivity in a TaIrTe4/NbSe2 heterostructure
Abstract
Coupling topological surface states with superconductivity provides a powerful route to realizing a topological superconducting phase that can host Majorana zero modes and support fault-tolerant topological quantum computation. Here, we report proximity-induced two-dimensional superconductivity in a TaIrTe4/NbSe2 heterostructure, where superconductivity is induced into the surface of the type-II Weyl semimetal TaIrTe4. Differential resistance spectra reveal pronounced subgap oscillations, indicating multiple induced superconducting gaps associated with the coexistence of electron and hole Fermi pockets in TaIrTe4. The induced superconductivity exhibits strong anisotropy: while a modest out-of-plane magnetic field is sufficient to suppress the superconducting state, the in-plane upper critical field remains much higher and exceeds the Pauli limit below 2.7 K. Angular-dependent upper critical field measurements reveal a distinct Tinkham-like cusp, together with the Berezinskii–Kosterlitz–Thouless transition, confirming the two-dimensional nature of the induced superconductivity. These results establish TaIrTe4/NbSe2 heterostructure as a versatile platform for exploring superconductivity mediated by topological surface states in type-II Weyl systems.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (10)
Zhi-Hui Ren
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology 1 , Beijing 100081,
Xue-Tao Di
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology 1 , Beijing 100081,
Yong-Kai Li
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology 1 , Beijing 100081,
Si-Li Wu
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology 1 , Beijing 100081,
Hao-Chen Zhang
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology 1 , Beijing 100081,
Wen-Yuan Jia
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology 1 , Beijing 100081,
Yi-Xuan Li
Chong Wang
Zhi-Wei Wang
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology 1 , Beijing 100081,
Cai-Zhen Li
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology 1 , Beijing 100081,