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Electronic structure of a new magnetic Weyl semimetal candidate CeAlSi by using ARPES

ORAL

Abstract

Weyl semimetals with Weyl fermions denotes an electronic phase of matter in which two bands cross linearly in space. Here, using high-resolution angle-resolved photoemission spectroscopy, we have clearly resolved the distinct surface Fermi arcs along the Γ-M direction on the (001) surface of the candidate magnetic Weyl semimetal CeAlSi. In addition to this, the soft X-ray ARPES data shows the presence of Weyl nodes in this material. The obtained ARPES results are further supported by our systematic electronic structure calculations, thus confirming the presence of Fermi arcs and Weyl nodes in this material.

 

* This work is supported by the Air Force Office of Scientific Research MURI (FA9550-20-1-0322).

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Presenters

  • Anup Pradhan Sakhya

    University of Central Florida

Authors

  • Anup Pradhan Sakhya

    University of Central Florida

  • Gyanendra Dhakal

    University of Central Florida

  • Cheng-Yi Huang

    Northeastern University

  • Sabin Regmi

    University of Central Florida

  • Hsin Lin

    Academia Sinica, Institute of Physics, Academia Sinica, Taiwan

  • Bahadur Singh

    Tata Institute of Fundamental Research, Tata Institute for Fundamental Research, TIFR, Tata Institute of Fundamental Research, Mumbai, Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Mumbai, India

  • Fazel Tafti

    Boston College

  • Arun Bansil

    Northeastern University, Department of Physics, Northeastern University, USA

  • Madhab Neupane

    University of Central Florida