Anomalous Metallic State Driven by Magnetic Field at the LaAlO$_{3}$/KTaO$_{3}$ (111) Interface
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* , and Jia-Cai Nie*
Department of Physics, Beijing Normal University, Beijing 100875, China
Abstract ：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 LaAlO$_{3}$/KTaO$_{3}$ (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 LaAlO$_{3}$/KTaO$_{3}$ (111) interface emerges as a platform to scrutinize the details of the anomalous metallic state in a controllable way.
收稿日期: 2023-01-16
Editors' Suggestion
出版日期: 2023-02-28
:
73.43.Nq
(Quantum phase transitions)
74.78.-w
(Superconducting films and low-dimensional structures)
73.40.-c
(Electronic transport in interface structures)
74.25.N-
(Response to electromagnetic fields)
引用本文:
. [J]. 中国物理快报, 2023, 40(3): 37301-.
链接本文:
https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/40/3/037301
或
https://cpl.iphy.ac.cn/CN/Y2023/V40/I3/37301
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2023, Vol. 40 
