Evidence for Berezinskii-Kosterlitz-Thouless transition in atomically flat two-dimensional Pb superconducting films

Weiwei Zhao, Qingyan Wang, Minhao Liu, Wenhao Zhang, Yilin Wang, Mu Chen, Yang Guo, Ke He, Xi Chen, Yayu Wang, Jian Wang, Xincheng Xie, Qian Niu, Lili Wang, Xucun Ma, Jainendra K. Jain, M. H.W. Chan, Qi Kun Xue

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)59-63
Number of pages5
JournalSolid State Communications
Volume165
DOIs
StatePublished - 2013

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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