Spectroscopic Evidence of Antiferromagnetic Valence Band Reconstruction in EuZn<sub>2</sub>As<sub>2</sub>

ORAL

Abstract

Eu-based materials have been recognized as an interesting platform for studying the interplay between localized Eu moments and itinerant electrons. These spin-carrier interactions produce modifications to electronic transport that have their origin in (a) scattering of itinerant carriers and (b) reconstruction of the electronic structure. Here, we perform detailed magnetoresistance and angle-resolved photoemission spectroscopy (ARPES) measurements on Eu-ternary pnictide, EuZn2As2, in order to evaluate the role of the valence band structure reconfiguration in this system. Through transport measurements, we confirm the presence of a strong negative magnetoresistance most pronounced at the antiferromagnetic transition temperature of 19 K. Our ARPES results reveal concurrent reconstruction of the valence electronic states across the AFM transition. This work offers insight into the interplay of electronic properties and magnetic ordering in rare-earth based compounds.

**This work is supported by the Air Force Office of Scientific Research MURI (FA9550-20- 1-0322) and National Science Foundation (NSF) CAREER award DMR1847962.

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Presenters

  • Milo Sprague

    • University of Central Florida
    • Department of Physics, University of Central Florida

Authors

  • Milo Sprague

    • University of Central Florida
    • Department of Physics, University of Central Florida

  • Anup Pradhan Sakhya

    • University of Central Florida
    • Department of Physics, University of Central Florida

  • Mazharul Islam Mondal

    • University of Central Florida

  • Iftakhar Bin Elius

    • University of central Florida
    • University of Central Florida
    • Department of Physics, University of Central Florida

  • Nathan A Valadez

    • University of Central Florida
    • Department of Physics, University of Central Florida

  • Kali Booth

    • University of Central Florida
    • Department of Physics, University of Central Florida

  • Barun Ghosh

    • Northeastern University, Boston, USA

  • Dariusz Kaczorowski

    • Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Ok´olna 2, 50-422 Wroc law, Poland
    • Polish Academy of Sciences
    • Institute of Low Temperature and Structure Research, Polish Academy of Sciences

  • Arun Bansil

    • Northeastern University

  • Madhab Neupane

    • University of Central Florida
    • Department of Physics, University of Central Florida