Larger in-plane upper critical field and superconducting diode effect observed in topological superconductor candidate InNbS_(2)nanoribbons  

作　　者：Bo Zheng Changlong Wang Xukun Feng Xiaozhen Sun Shasha Wang Dawei Qiu Xiang Ma Ruimin Li Guanglei Cheng Lan Wang Yalin Lu Peng Li Shengyuan A.Yang Bin Xiang 

机构地区：[1]Department of Materials Science and Engineering,CAS Key Lab of Materials for Energy Conversion,Anhui Laboratory of Advanced Photon Science and Technology,University of Science and Technology of China,Hefei 230026,China [2]Research Laboratory for Quantum Materials,Singapore University of Technology and Design,Singapore 487372,Singapore [3]School of Microelectronics,University of Science and Technology of China,Hefei 230052,China [4]CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China [5]Lab of Low Dimensional Magnetism and Spintronic Devices,School of Physics,Hefei University of Technology,Hefei 230009,China [6]Research Laboratory for Quantum Materials,IAPME,University of Macao,Macao,China

出　　处：《Nano Research》2024年第7期6686-6694,共9页纳米研究（英文版）

基　　金：supported by Innovation Program for Quantum Science and Technology(No.2021ZD0302800);the National Natural Science Foundation of China(Nos.52373309 and 12374177);University of Macao Start-up research grant(No.SRG2023-00057-IAPME);National Synchrotron Radiation Laboratory(No.KY2060000177).

摘　　要：Recently,the coexistence of topology and superconductivity has garnered considerable attention.Specifically,the dimensionality of these materials is crucial for the realization of topological quantum computation.However,the naturally grown materials,especially with one-dimensional feature that exhibits the coexistence of topology and superconductivity,still face challenges in terms of experimental realization and scalability,which hinders the fundamental research development and the potential to revolutionize quantum computing.Here,we report the first experimental synthesis of quasi-one-dimensional InNbS_(2)nanoribbons that exhibit the coexistence of topological order and superconductivity via a chemical vapor transport method.Especially,the inplane upper critical field of InNbS_(2)nanoribbons exceeds the Pauli paramagnetic limit by more than 2.2 times,which can be attributed to the enhanced spin-orbit coupling and the weakened interlayer interaction between the NbS_(2)layers induced by the insertion of In atoms,making InNbS_(2)exhibit spin-momentum locking similar to that of monolayer NbS_(2).Moreover,for the first time,we report the superconducting diode effect in a quasi-one-dimensional superconductor system without any inherent geometric imperfections.The measured maximum efficiency is manifested as 14%,observed atμ0H≈±60 mT,and we propose that the superconducting diode effect can potentially be attributed to the presence of the nontrivial topological band.Our work provides a platform for studying exotic phenomena in condensed matter physics and potential applications in quantum computing and quantum information processing.

关 键 词：topological order superconductivity NANORIBBON superconducting anisotropy superconducting diode 

分 类 号：O41[理学—理论物理]