Electrical transport properties of topological insulator Bi2Te3 nanowires contacted with superconducting electrodes

ORAL

Abstract

Single-crystal Bi2Te3 nanowires were fabricated by template-assisted electrochemical deposition. The electrical transport properties of the nanowires in the temperature range 1.8-300 K were investigated by connecting nonsuperconducting or superconducting electrodes. When the wire was connected to focused-ions beam deposited W-electrodes, a series of exotic quasi-periodic oscillations were found and the amplitude of the oscillations was unusually enhanced near 3.5 K below the Tc, 4.5 K, of W-electrodes. When the wire was connected to nonsuperconducting Pt electrodes, the wire showed positive magnetoresistance accompanied with random fluctuations.

*This work was supported bythe center for nanoscale science (Penn State MRSEC) funded by NSF under Grant No. DMR-0820404.

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Authors

  • Mingliang Tian

    • The Pennsylvania State University

  • Jian Wang

    • Physics Department, Penn State University
    • Physics Dept., Penn State University, University Park PA 16802
    • Penn State University
    • Center for Nanoscale Science and Materials Research Institute, Penn State University, University Park PA 16802.
    • The Pennsylvania State University

  • Meenakshi Singh

    • Physics Department, Penn State University
    • The Pennsylvania State University

  • Moses Chan

    • The Pennsylvania State University
    • Physics Department, Penn State University
    • Pennsylvania State University
    • Physics Dept., Penn State University, University Park PA 16802
    • Penn State University