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Intrinsic tunable anomalous Hall effect induced by momentum-space Berry curvature in SrRuO<sub>3</sub>

ORAL

Abstract

Broken time-reversal symmetry and spin-orbit coupling (SOC) in strongly correlated ferromagnetic materials are expected to induce novel phenomena. One of these ferromagnetic materials, SrRuO3 (SRO), is well-known for showing non-monotonous anomalous Hall effect (AHE), which is produced due to magnetic monopoles, or large Berry curvature in momentum space. Recently, we observed an abnormal behavior of AHE in SRO ultrathin films. To explain this, we measured angle-resolved photoemission spectroscopy (ARPES) of SRO ultrathin film. We found that non-monotonous AHE is induced by band-structure nodal lines, which open a gap due to SOC and magnetization. By changing temperature and thickness of SRO, the sign of AHE can be tunable with a variation of large Berry curvature.

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Presenters

  • Byungmin Sohn

    Physics and Astronomy, Seoul National University, Department of Physics and Astronomy, Seoul National University

Authors

  • Byungmin Sohn

    Physics and Astronomy, Seoul National University, Department of Physics and Astronomy, Seoul National University

  • Eunwoo Lee

    Physics and Astronomy, Seoul National University

  • Ji Seop Oh

    Physics and Astronomy, Seoul National University

  • Wonshik Kyung

    Physics, Seoul Natl Univ, Physics and Astronomy, Seoul National University, Department of Physics and Astronomy, Seoul Natl Univ, Seoul Natl Univ

  • Hanyoung Yoo

    Physics and Astronomy, Seoul National University, Department of Physics and Astronomy, Seoul Natl Univ

  • Bohm-Jung Yang

    Physics and Astronomy, Seoul National University, Seoul Natl Univ, Depeartment of Physics and Astronomy, Seoul National University

  • Changyoung Kim

    Physics, Seoul Natl Univ, Physics and Astronomy, Seoul National University, Department of Physics and Astronomy, Seoul National University, Department of Physics and Astronomy, Seoul Natl Univ, Seoul Natl Univ, Center for Correlated Electron Systems, Institute for Basic Science