Interface induced Zeeman-protected superconductivity in ultrathin crystalline lead films

作     者：Liu, Yi Wang, Ziqiao Zhang, Xuefeng Liu, Chaofei Liu, Yongjie Zhou, Zhimou Wang, Junfeng Wang, Qingyan Liu, Yanzhao Xi, Chuanying Tian, Mingliang Liu, Haiwen Feng, Ji Xie, X.C. Wang, Jian 

作者机构：International Center for Quantum Materials School of Physics Peking University Beijing100871 China Collaborative Innovation Center of Quantum Matter Beijing100871 China Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan430074 China Institute of Physics Chinese Academy of Sciences Beijing100190 China High Magnetic Field Laboratory Chinese Academy of Sciences Hefei Anhui230031 China Center for Advanced Quantum Studies Department of Physics Beijing Normal University Beijing100875 China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing100190 China 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2018年

核心收录：

主　　题：Molecular beam epitaxy 

摘      要：Two dimensional (2D) superconducting systems are of great importance to exploring exotic quantum physics. Recent development of fabrication techniques stimulates the studies of high quality single crystalline 2D superconductors, where intrinsic properties give rise to unprecedented physical phenomena. Here we report the observation of Zeeman-type spin-orbit interaction protected superconductivity (Zeeman-protected superconductivity) in 4 monolayer (ML) to 6 ML crystalline Pb films grown on striped incommensurate (SIC) Pb layers on Si(111) substrates by molecular beam epitaxy (MBE). Anomalous large in-plane critical field far beyond the Pauli limit is detected, which can be attributed to the Zeeman-protected superconductivity due to the in-plane inversion symmetry breaking at the interface. Our work demonstrates that in superconducting heterostructures the interface can induce Zeeman-type spin-orbit interaction (SOI) and modulate the superconductivity. Copyright © 2018, The Authors. All rights reserved.