Probing the interaction between coupled Weyl points via magneto-infrared spectroscopy.

ORAL

Abstract

Weyl semimetals (WSMs) are a newly discovered quantum state of matter with topological protection characterized by a pair of Weyl points (WPs) with linear dispersion in all directions. When the bands of two WPs overlap, their interaction can significantly change the energy dispersion, resulting in unique responses in WSM. Here, we present a combined theoretical and experimental study of Niobium Phosphide (NbP), an established WSM. Our magneto-infrared reflectance measurements show that the Landau levels in NbP are strongly modified from an isolated WP picture. By considering the interaction between two WPs, our model can reach a semi-quantitative agreement with the experiment. Our result signifies the crucial role of the interaction effect in understanding the rich physical phenomena in WSM. We also discuss other unique implications of this interaction picture, which could be used to distinguish a WSM from a Dirac semimetal.

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Presenters

  • Yuxuan Jiang

    • 1800 East Paul Dirac Drive, Natl High Magnetic Field Lab
    • Natl High Magnetic Field Lab

Authors

  • Yuxuan Jiang

    • 1800 East Paul Dirac Drive, Natl High Magnetic Field Lab
    • Natl High Magnetic Field Lab

  • Zhiling Dun

    • Department of Physics and Astronomy, University of Tennessee
    • School of Physics, Georgia Institute of Technology
    • School of Physics, Georgia Tech
    • Georgia Institute of Technology
    • Physics, Georgia Institute of Technology
    • Physics, Georgia Inst of Tech

  • Seongphill Moon

    • 1800 East Paul Dirac Drive, Natl High Magnetic Field Lab
    • Natl High Magnetic Field Lab

  • Haidong Zhou

    • Physics and Astronomy, Univ of Tennessee, Knoxville
    • Physics and Astronomy, University of Tennessee Knoxville
    • Department of Physics and Astronomy, University of Tennessee
    • Department of Physics and Astronomy, University of Tennessee Knoxville
    • Department of Physics & Astronomy, University of Tennessee
    • University of Tennessee
    • Physics and Astronomy, University of Tennessee
    • Physics, University of Tennessee
    • Univ of Tennessee, Knoxville
    • Physics and Astronomy, University of Tennessee, knoxville
    • Dept. of Physics and Astronomy, University of Tennessee

  • Dmitry Smirnov

    • 1800 East Paul Dirac Drive, Natl High Magnetic Field Lab
    • Natl High Magnetic Field Lab
    • National High Magnetic Field Laboratory
    • NHMFL
    • Condensed Matter Science, National High Magnetic Field Laboratory
    • NHMFL, FSU

  • Zhigang Jiang

    • Georgia Institute of Technology
    • Physics, Georgia Institute of Technology