Fabrication of Bi$_{2}$Te$_{3}$ Nanodots by Droplet Epitaxy on GaAs substrates

ORAL

Abstract

Bi$_{2}$Te$_{3}$, as a three-dimensional topological insulator, causes wide attention. Here, we report the fabrication of Bi$_{2}$Te$_{3}$ nanodots on GaAs substrate by droplet epitaxy using molecular beam epitaxy (MBE). Reflection high energy electron diffraction (RHEED), atomic force microscopy (AFM), x-ray photoelectron spectroscopy (XPS), and Raman measurement revealed the existence of Bi$_{2}$Te$_{3}$ nanodots. Several approaches were developed to control the size and density of as-grown Bi$_{2}$Te$_{3}$ nanodots. Temperature and density dependent magneto-transport measurements were investigated. This may provide a platform for the interaction investigation among topological insulators, semiconductors, ferromagnets and superconductors.

–

Authors

  • Zhaoquan Zeng

    • Department of Physics, University of Arkansas, Fayetteville, AR 72701

  • Chen Li

    • Department of Physics, University of Arkansas, Fayetteville, AR 72701

  • Dongsheng Fan

    • Department of Electrical Engineering, University of Arkansas, Fayetteville, AR 72701

  • Yusuke Hirono

    • Department of Physics, University of Arkansas, Fayetteville, AR 72701

  • Timothy Morgan

    • Department of Physics, University of Arkansas, Fayetteville, AR 72701

  • Xian Hu

    • Department of Physics, University of Arkansas, Fayetteville, AR 72701

  • Jian Wang

    • The Center for Nanoscale Science and Department of Physics, The Pennsylvania State University, University Park, PA 16802

  • Meenakshi Singh

    • Pennsylvania State University
    • The Center for Nanoscale Science and Department of Physics, The Pennsylvania State University, University Park, PA 16802

  • Zhiming Wang

    • State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China

  • Shui-Qing Yu

    • Department of Electrical Engineering, University of Arkansas, Fayetteville, AR 72701

  • Aqiang Guo

    • Department of Physics, University of Arkansas, Fayetteville, AR 72701

  • Gregory Salamo

    • Institute for Nanoscience \& Engineering, University of Arkansas
    • Department of Physics, University of Arkansas, Fayetteville, AR 72701