Strain induced enhancement of magnetoresistance in Weyl semimetal MoTe$_{\mathrm{2}}$.

ORAL

Abstract

Recently MoTe$_{\mathrm{2}}$ that belongs to the type II Weyl semimetals, has attracted considerable attentions because of its intriguing topological physics as well as its potential applications in information technology. For instance, an extremely large magnetoresistance (MR) that is crucial for either sensitive magnetic sensors or the basic elements in magnetic random access memories, has been observed in \quad MoTe$_{\mathrm{2}}$. More interestingly, it was also found that external pressure can dramatically enhance its superconducting transition temperature. Strain is another novel method to tune the physical properties of materials. Tuning the physical properties of Weyl semimetal by strain has not been reported to date. Here, we present the evidence from an electric transport experiment on a single crystal MoTe$_{\mathrm{2}}$, that the strain can significantly enhance the MR by around 28{\%}. From the measurements, we observed that the enhancement of MR induced by strain increases with decreasing temperature and also increases with increasing magnetic field. It reaches a maximum value of 28{\%} at 2 K at 9 T. The observed strain induced enhancement of MR in MoTe$_{\mathrm{2}}$ provides insights into the interplay between strain and the topological physics.

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Authors

  • Junjie Yang

    Univ of Virginia, Department of Physics, University of Virginia

  • Jonathan Tan

    Duquesne University, Baker Hughes, Hampton University, Korea Research Institute of Standards and Science, Electronics and Telecommunications Research Institute, Texas Christian University, University of North Texas Health Science Center, Austin Peay State University, Virginia Military Institute, Pennsylvania State University, University of Virginia, Washington University, National Institute for Materials Science, Japan, Tokyo Metropolitan University, Japan, Univ of Kentucky, Argonne National Laboratory, Oak Ridge National Laboratory, Univ of Virginia, James Madison University, Department of Chemistry & Biochemistry, High Point University, Department of Chemistry, High Point University, Department of Physics, James Madison University, Department of Physics & Astronomy, Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA, Institute of Renewable Energy and Environment Technology, University of Bolton, Bolton, UK, Division of Materials Science and Engineering, Ames Laboratory, US Dept. of Energy, Ames, IA, Lehigh University, University of Pardubice, Universite de Rennes, Jan Dlugosz University, Translume, NSCL/FRIB, Duke University, University of Massachusetts - Amherst, University of St. Andrews, National Radio Astronomy Observatory, University of Florida, Yale University, None, Georgia College & State Univ, Georgia College & State University, National University of Sciences and Technology (NUST), Univ of Tennessee Space Inst, The University of Virginia, Chiang Mai University, DHA Suffa University, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic, Department of Physics and Astronomy, Austin Peay State University, Clarksville, TN, United States, George Mason University, Northern Virginia Community College, Department of Physics, University of Virginia, Istanbul University, Georgia College and State University, University of Houston, Western Kentucky Univ, James Madison University, Virginia Polytechnic Institute and State University, Pontifica Universidad Catolica de Chile, Trent University, Univ of Arizona, Ohio State University, NRAO, University of Virginia/NRAO