Magneto-optical studies on an atomically-thin van der Waals ferromagnetic semiconductor

ORAL

Abstract

The increasing need for computational power and data storage demands novel materials to improve existing technology. Ferromagnetic (FM) semiconductors are promising materials to simultaneously control charge and spin ordering, and provide a method to electrically control spin-active devices. Atomically thin van der Waals materials exhibit a variety of technologically relevant phenomena in a truly two-dimensional platform. Ferromagnetism or FM semiconductivity in 2D materials, however, has yet to be demonstrated. Recent studies suggest the possible existence of 2D FM semiconductors in single-layer chromium trihalides. Here, we discuss our magneto-optical measurements on chromium triiodide (CrI$_{\mathrm{3}})$ to determine its magnetic ordering as a function of layer thickness, magnetic field, and temperature.

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Authors

  • Bevin Huang

    Univ of Washington, University of Washington

  • Genevieve Clark

    Univ of Washington

  • Efrén Navarro-Moratalla

    Massachusetts Institute of Technology, Massachuusetts Institute of Technology, MIT

  • Dahlia Klein

    Massachusetts Institute of Technology

  • Ran Cheng

    Carnegie Mellon University

  • Kyle Seyler

    Univ of Washington, University of Washington

  • Emma Schmidgall

    Univ of Washington, University of Washington

  • Michael McGuire

    Oak Ridge National Laboratory, Oak Ridge National Lab

  • David Cobden

    Department of Physics, University of Washington, Department of Physics, University of Washington, Seattle, WA 98195, USA, Univ of Washington, University of Washington

  • Wang Yao

    University of Hong Kong, University of Hong Kong, Hong Kong, China

  • Di Xiao

    Carnegie Mellon University, Carnegie Mellon Univ, Department of Physics, Carnegie Mellon University, Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA

  • Pablo Jarrilo-Herrero

    Massachusetts Institute of Technology, USA, Massachusetts Institute of Thechnology, Massachusetts Inst of Tech-MIT, Massachusetts Institute of Technology, MIT

  • Xiaodong Xu

    University of Wasington, University of Washington, Univ of Washington, Department of Physics, University of Washington, University of Washington, Seattle, USA.