超导电性
凝聚态物理
多重分形系统
物理
单层
铌
杂质
量子
量子力学
材料科学
纳米技术
分形
数学
数学分析
冶金
作者
Kun Zhao,Hsiu-Li Lin,Xiao Xiao,Wantong Huang,Wei Yao,Mingzhe Yan,Ying Xing,Qinghua Zhang,Zixiang Li,Shintaro Hoshino,Jian Wang,Shuyun Zhou,Lin Gu,M. S. Bahramy,Hong Yao,Naoto Nagaosa,Qi–Kun Xue,K. T. Law,Xi Chen,Shuai‐Hua Ji
出处
期刊:Nature Physics
[Springer Nature]
日期:2019-07-15
卷期号:15 (9): 904-910
被引量:92
标识
DOI:10.1038/s41567-019-0570-0
摘要
The interplay between disorder and superconductivity is a subtle and fascinating phenomenon in quantum many body physics. The conventional superconductors are insensitive to dilute nonmagnetic impurities, known as the Anderson's theorem. Destruction of superconductivity and even superconductor-insulator transitions occur in the regime of strong disorder. Hence disorder-enhanced superconductivity is rare and has only been observed in some alloys or granular states. Because of the entanglement of various effects, the mechanism of enhancement is still under debate. Here we report well-controlled disorder effect in the recently discovered monolayer NbSe$_2$ superconductor. The superconducting transition temperatures of NbSe$_2$ monolayers are substantially increased by disorder. Realistic theoretical modeling shows that the unusual enhancement possibly arises from the multifractality of electron wave functions. This work provides the first experimental evidence of the multifractal superconducting state.
科研通智能强力驱动
Strongly Powered by AbleSci AI