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.

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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