Complex electronic structure evolution in a rare-earth based monopnictide*

ORAL

Abstract

In pursuit of intriguing topological phases, the rare-earth monopnictide (REM) family, which has magnetic ground states that exhibit high magnetoresistance, has emerged to be a growing field of research. Here, we study the evolution of the electronic structure of the candidate REM Dirac semimetal NdSb across the magnetic transition by using high-resolution angle-resolved photoemission spectroscopy along with first-principles density functional-theory based modeling. Three arc-like features in the zone corner and a complex band structure resembling an angel's wing have been discovered. It is revealed that the magnetic transition is what causes this drastic reconstruction of the itinerant bands surrounding the zone center: Specifically, in the antiferromagnetic phase, the Nd 5d electron band backfolds at the Γ point and hybridizes with the Sb 5p hole bands. Our study indicates that antiferromagnetism plays an intricate role in the electronic structure of the REM family.





**This work is supported by the National Science Foundation (NSF) CAREER award DMR1847962, the Center for Thermal Energy Transport under Irradiation, an Energy Frontier Research Center funded by the U.S. DOE, Office of Basic Energy Sciences, and the Air Force Office of Scientific Research MURI (FA9550-20- 1-0322).

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Publication: Sakhya, A. P. et al. Complex electronic structure evolution of NdSb across the magnetic transition. Preprint at https://doi.org/10.48550/arXiv.2203.05879 (2022).

Presenters

  • Anup Pradhan Sakhya

    • University of Central Florida

Authors

  • Anup Pradhan Sakhya

    • University of Central Florida

  • Baokai Wang

    • Northeastern University

  • Firoza Kabir

    • University of Central Florida

  • Cheng-Yi Huang

    • Northeastern University

  • Md Mofazzel Hosen

    • Department of Physics, University of Central Florida, Orlando, Florida 32816, USA
    • Boston College

  • Bahadur Singh

    • Tata Institute of Fundamental Research, Mumbai, India
    • Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Colaba, Mumbai 400005, India
    • Department of condensed matter physics and material science, Tata institute of fundamental research, Mumbai, India
    • Tata Institute of Fundamental Research, India
    • Tata Institute of Fundamental Research

  • Sabin Regmi

    • University of Central Florida
    • University of Central Florida; Idaho National Laboratory

  • Gyanendra Dhakal

    • University of Central Florida

  • Klauss M Dimitri

    • University of Central Florida

  • Milo X Sprague

    • University of Central Florida

  • Robert Smith

    • University of Central Florida

  • Eric D Bauer

    • Los Alamos Natl Lab

  • Filip Ronning

    • Los Alamos Natl Lab

  • Arun Bansil

    • Northeastern University
    • Northeastern University, Boston, USA

  • Madhab Neupane

    • University of Central Florida