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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

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

  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry

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