Point Contact Spectroscopy Study of the New Superconductor Nb2PdxSe5

ORAL

Abstract

We have systematically investigated the temperature dependence of the energy gap structure for the new quasi-one-dimensional superconductor Nb2PdxSe5 by point contact spectroscopy (PCS). Our studies were performed on highly transparent Andreev reflection junctions evidenced by sharp and dramatic conductance enhancements at low temperatures. By applying the BTK model, we find that the energy gap scales with the transition temperature (Tc$=$5.5 K) in a BCS-like manner. Details of this and a few anomalous features of the PCS will be presented.

*Supported by NSF DMR-1104256 and AFOSR-MURI FA9550-09-1-0603.

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Authors

  • Yeping Jiang

    • Center of Nanophysics and Advance materials (CNAM), University of Maryland
    • Univ of Maryland-College Park

  • Xiaohang Zhang

    • Center of Nanophysics and Advance materials (CNAM), University of Maryland

  • Ichiro Takeuchi

    • Center of Nanophysics and Advance materials (CNAM), University of Maryland

  • Richard Greene

    • Center of Nanophysics and Advance materials (CNAM), University of Maryland

  • Seunghyun Khim

    • Seoul National University

  • Bumsung Lee

    • Seoul National University

  • Kee-Hoon Kim

    • Seoul National University