Author/Authors :
Zhao، نويسنده , , Weiwei and Wang، نويسنده , , Qingyan and Liu، نويسنده , , Minhao and Zhang، نويسنده , , Wenhao and Wang، نويسنده , , Yilin and Chen، نويسنده , , Mu Yao Guo، نويسنده , , Yang and He، نويسنده , , Ke and Chen، نويسنده , , Xi and Wang، نويسنده , , Yayu and Wang، نويسنده , , Jian and Xie، نويسنده , , Xincheng and Niu، نويسنده , , Qian and Wang، نويسنده , , Lili and Ma، نويسنده , , Xucun and Jain، نويسنده , , Jainendra K. and Chan، نويسنده , , M.H.W. and Xue، نويسنده , , Qi-Kun، نويسنده ,
Abstract :
We report results from scanning tunneling microscopy and transport measurements on a series of crystalline lead films containing an integer number of atomic layers, and find that the observed features in sufficiently thin films are consistent with Berezinskii–Kosterlitz–Thouless (BKT) physics. Specifically, Cooper pairing and superconductivity disappear at two distinct temperatures; the current–voltage characteristics in the intermediate phase are non-Ohmic; and the temperature and current dependences of resistance agree with the expectation from the BKT theory.
Keywords :
B. BKT transition , D. Transport measurement , C. Scanning tunneling microscopy , A. Crystalline lead films
