Anomalous magnetic moments as evidence of chiral superconductivity in Bi/Ni bilayer
ORAL
Abstract
There have been continuous efforts in searching for unconventional superconductivity over the past five decades. Compared to the well-established d-wave superconductivity in cuprates, the existence of superconductivity with other high-angular-momentum pairing symmetries is less conclusive. Bi/Ni epitaxial bilayer is a potential unconventional superconductor with broken time reversal symmetry (TRS), for that it demonstrates superconductivity and ferromagnetism simultaneously at low temperatures. We employ a specially designed superconducting quantum interference device (SQUID) to detect, on the Bi/Ni bilayer, the orbital magnetic moment which is expected if the TRS is broken. An anomalous hysteretic magnetic response has been observed in the superconducting state, providing the evidence for the existence of chiral superconducting domains in the material. [1] Junhua Wang et al., arXiv: 1611.02946v1
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Authors
Li Lu
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, People's Republic of China
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
Junhua Wang
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
Xinxin Gong
State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, People's Republic of China
Guang Yang
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
Zhaozheng Lyu
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
Yuan Pang
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
Guangtong Liu
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
Zhongqing Ji
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
Jie Fan
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
Xiunian Jing
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
Changli Yang
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
Fanming Qu
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
Xiaofeng Jin
State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, People's Republic of China
