Spectroscopic evidence for spin splitting in a collinear antiferromagnet

ORAL

Abstract

The Anomalous Hall effect (AHE) has been understood in close relation to nontrivial band topology. Recently, it has been proposed that AHE can arise in compensated collinear magnets with opposite-spin sublattices connected by rotational symmetry. This distinct magnetic phase, so-called 'altermagnetism', is characterized by time-reversal symmetry (TRS) broken electronic structure with non-relativistic spin-momentum locking. We performed angle-resolved photoemission spectroscopy (ARPES) on semiconducting MnTe, an altermagnetic candidate. Spin-split electronic structure with a large splitting of ~1 eV is clearly resolved. The compensated magnetic semiconductor with TRS-broken electonic structure provides a new platform for novel topological spintronics.

*This work is supported by the Institute for Basic Science in Korea (Grant No. IBS-R009-G2).

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Presenters

  • Suyoung Lee

    • Seoul National University

Authors

  • Suyoung Lee

    • Seoul National University

  • Changyoung Kim

    • Seoul Natl Univ
    • Seoul National University
    • Department of Physics and Astronomy, Seoul National University
    • Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
    • Seoul national university

  • Sangjae Lee

    • Seoul National University

  • Donghan Kim

    • Seoul National University
    • Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
    • Seoul national university