Superconductor-insulator transition in quasi-one-dimensional single-crystal Nb2PdS5 nanowires

Wei Ning, Hongyan Yu, Yequn Liu, Yuyan Han, Ning Wang, Jiyong Yang, Haifeng Du, Changjin Zhang, Zhiqiang Mao, Ying Liu, Mingliang Tian, Yuheng Zhang

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26 Scopus citations


Superconductor-insulator transition (SIT) in one-dimensional (1D) nanowires attracts great attention in the past decade and remains an open question since contrasting results were reported in nanowires with different morphologies (i.e., granular, polycrystalline, or amorphous) or environments. Nb2PdS5 is a recently discovered low-dimensional superconductor with typical quasi-1D chain structure. By decreasing the wire diameter in the range of 100-300 nm, we observed a clear SIT with a 1D transport character driven by both the cross-sectional area and external magnetic field. We also found that the upper critical magnetic field (Hc2) decreases with the reduction of nanowire cross-sectional area. The temperature dependence of the resistance below Tc can be described by the thermally activated phase slip (TAPS) theory without any signature of quantum phase slips (QPS). These findings demonstrated that the enhanced Coulomb interactions with the shrinkage of the wire diameter competes with the interchain Josephson-like coupling may play a crucial role on the SIT in quasi-1D system.

Original languageEnglish (US)
Pages (from-to)869-875
Number of pages7
JournalNano letters
Issue number2
StatePublished - Feb 11 2015

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


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