Scanning tunneling microscopy study on new layered superconductor Ta4Pd3Te16 single crystal

POSTER

Abstract

Ta4Pd3Te16 is a newly discovered layered superconductor with quasi one dimensional crystal structure. Recent measurements show that it may host unconventional superconductivity. Here we report low-temperature scanning tunneling microscopy/spectroscopy study on this single crystal. Chains like atomic structure on cleaved (-103) surface is observed. There exists CDW like modulations with commensurate periods. The tunneling conductance shows an s-wave like superconducting gap. Vortex lattice is observed in magnetic field, but single vortex core is much larger than expected from bulk Hc2. The superconductivity gap is rapidly suppressed by applied field. Our observations can be well understood by multi-band superconductivity.

Authors

  • Tong Zhang

    • Fudan University
    • State Key Laboratory of Surface Physics, Department of Physics, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, China

  • Qin Fan

    • State Key Laboratory of Surface Physics, Department of Physics, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, China

  • Wenhao Zhang

    • State Key Laboratory of Surface Physics, Department of Physics, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, China

  • Xi Liu

    • State Key Laboratory of Surface Physics, Department of Physics, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, China

  • Yajun Yan

    • State Key Laboratory of Surface Physics, Department of Physics, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, China

  • Mingqiang Ren

    • State Key Laboratory of Surface Physics, Department of Physics, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, China

  • Miao Xia

    • State Key Laboratory of Surface Physics, Department of Physics, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, China

  • Wenhe Jiao

    • Department of Physics, Zhejiang University, Hangzhou 310027, China

  • Guang-Han Cao

    • Department of Physics, Zhejiang University, Hangzhou 310027, China
    • Department of Physics, Zhejiang University
    • Zhejiang Univ

  • Binping Xie

    • Fudan University
    • State Key Laboratory of Surface Physics, Department of Physics, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, China

  • Donglai Feng

    • Fudan University
    • Dept. of Physics, Fudan University
    • State Key Laboratory of Surface Physics, Department of Physics, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, China