Ultrafast topological resonances in transition metal dichalcogenide monolayers

COFFEE_KLATCH · Invited

Abstract

We predict that a single cycle of a circularly polarized intense laser pulse populates the conduction band of the monolayer of transition metal dichalcogenides and induces ultrafast and strong valley polarization. This induced valley polarization is a result of ultrafast topological resonances, which occur when the topological (geometrical) phase and dynamic phase cancel out each other. The topological resonance, a nonlinear phenomenon independent of the electron spin, is manifested in materials with hexagonal lattice and broken inversion symmetry.

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Authors

  • S. Azar Oliaei Motlagh

    Georgia State University

  • Emmanuel Sarpong

    Georgia State University, University of Alabama at Birmingham, American Association of Physics Teachers, Bradley University, Michigan State University, University of St. Thomas, Kansas State University, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, University of Delhi, University of Mississippi, Vanderbilt University, Universidad de los Andes (Colombia), President of UNCW SPS Chapter, Duke University, NC Central University, Davidson College, Beijing Normal University, University of California, Los Angeles, University of Tennessee, Chattanooga, University of Kentucky, Syracuse University, Clemson University, Department of Physics & Astronomy, Florida International University, Oak Ridge National Lab, Indiana University, Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II), Bowie State University, MD, Oak Ridge National Laboratory, University of Tennessee, Knoxville, Arizona State University, University of California, Davis, North Carolina State University, Virginia Commonwealth University, North Carolina A&T State University, UNC Charlotte

  • Emmanuel Sarpong

    Georgia State University, University of Alabama at Birmingham, American Association of Physics Teachers, Bradley University, Michigan State University, University of St. Thomas, Kansas State University, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, University of Delhi, University of Mississippi, Vanderbilt University, Universidad de los Andes (Colombia), President of UNCW SPS Chapter, Duke University, NC Central University, Davidson College, Beijing Normal University, University of California, Los Angeles, University of Tennessee, Chattanooga, University of Kentucky, Syracuse University, Clemson University, Department of Physics & Astronomy, Florida International University, Oak Ridge National Lab, Indiana University, Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II), Bowie State University, MD, Oak Ridge National Laboratory, University of Tennessee, Knoxville, Arizona State University, University of California, Davis, North Carolina State University, Virginia Commonwealth University, North Carolina A&T State University, UNC Charlotte