Weyl fermions in SrRuO<sub>3</sub> detected by Brillouin light scattering-Reference-Cited by-同舟云学术

Weyl fermions in SrRuO₃ detected by Brillouin light scattering

Published:2022-06-13 Issue:24 Volume:120 Page:242408
ISSN:0003-6951
Container-title:Applied Physics Letters
language:en
Short-container-title:Appl. Phys. Lett.

Author:

Toyoda S.¹^ORCID,Yamada R.²,Kaneko Y.¹^ORCID,Tokura Y.¹²³^ORCID,Ogawa N.¹²⁴

Affiliation:

1. RIKEN Center for Emergent Matter Science (CEMS), Saitama 351-0198, Japan

2. Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan

3. Tokyo College, University of Tokyo, Tokyo 113-8656, Japan

4. PRESTO, Japan Science and Technology Agency (JST), 332-0012 Kawaguchi, Japan

Abstract

We report an observation of Weyl fermions in momentum space in an itinerant ferromagnet SrRuO3 single crystal via inelastic optical spectroscopy. A clear magnetic resonance around 200 GHz is observed in the Brillouin light scattering spectra, which corresponds to the ferromagnetic resonance at the Γ point. The spin-wave gap shows non-monotonous temperature dependence distinct from the bulk magnetization. The observed peculiar temperature evolution in the spin-wave gap scales with that of the anomalous Hall conductivity, which is a hallmark of Weyl fermions near the Fermi energy.

Funder

Japan Society for the Promotion of Science

Precursory Research for Embryonic Science and Technology

Core Research for Evolutional Science and Technology

Publisher

AIP Publishing

Subject

Physics and Astronomy (miscellaneous)

Link

https://aip.scitation.org/doi/pdf/10.1063/5.0096687

Reference18 articles.

1. The Anomalous Hall Effect and Magnetic Monopoles in Momentum Space