摘要
The origin of the quantum superconductor to metal transition at zero temperature in two-dimensional superconductors is still an open problem,which has caused intensely discussion.Here,we report the observation of a quantum superconductor-to-metal transition in La Al O_(3)/KTa O_(3)(111)interface,driven by magnetic field.When a small magnetic field perpendicular to the film plane is applied,the residual saturated resistance is observed,indicating the emergence of an anomalous metallic state associated with a failed superconductor.The dependence of saturated resistance on magnetic field at low temperature indicates that the observed metal state is a Bose metal state.From our findings,magnetic field regulating La Al O_(3)/KTa O_(3)(111)interface emerges as a platform to scrutinize the details of the anomalous metallic state in a controllable way.
作者
张子涛
乔宇杰
邵婷娜
赵强
陈星宇
陈美慧
朱芳慧
窦瑞芬
刘海文
熊昌民
聂家财
Zi-Tao Zhang;Yu-Jie Qiao;Ting-Na Shao;Qiang Zhao;Xing-Yu Chen;Mei-Hui Chen;Fang-Hui Zhu;Rui-Fen Dou;Hai-Wen Liu;Chang-Min Xiong;Jia-Cai Nie(Department of Physics,Beijing Normal University,Beijing 100875,China)
基金
the National Natural Science Foundation of China(Grant Nos.92065110,11974048,and 12074334)
the National Basic Research Program of China(Grant Nos.2014CB920903 and 2013CB921701)。
