Superconductor-Metal Quantum Transition at the EuO/KTaO3 Interface  

作　　者：Yang Ma Jiasen Niu Wenyu Xing Yunyan Yao Ranran Cai Jirong Sun X.C.Xie Xi Lin Wei Han 马扬;牛佳森;邢文宇;姚云焱;蔡冉冉;孙继荣;谢心澄;林熙;韩伟(International Center for Quantum Materials,School of Physics,Peking University,Beijing 100871,China;Beijing National Laboratory for Condensed Matter Physics&Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;CAS Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing 100190,China;Beijing Academy of Quantum Information Sciences,Beijing 100193,China)

机构地区：[1]International Center for Quantum Materials,School of Physics,Peking University,Beijing 100871,China [2]Beijing National Laboratory for Condensed Matter Physics&Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [3]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [4]CAS Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing 100190,China [5]Beijing Academy of Quantum Information Sciences,Beijing 100193,China

出　　处：《Chinese Physics Letters》2020年第11期93-97,共5页中国物理快报（英文版）

基　　金：Supported by the National Key R&D Program of China(Grant Nos.2019YFA0308401 and 2017YFA0303301);the National Natural Science Foundation of China(Grant Nos.11974025,11674009,and 11934016);the Beijing Natural Science Foundation(Grant No.1192009);the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB28000000)。

摘　　要：We report the experimental investigation of the superconductor-metal quantum phase transition of the Eu O/KTa O3 interface.Around the transition,a divergence of the dynamical critical exponent is observed,which supports the quantum Griffiths singularity in the Eu O/KTa O3 interface.The quantum Griffiths singularity could be attributed to large rare superconducting regions and quenched disorders at the interface.Our results could pave the way for studying the exotic superconducting properties at the Eu O/KTa O3 interface.

关 键 词：SINGULARITY QUANTUM TRANSITION 

分 类 号：O469[理学—凝聚态物理]