Ultrafast Dynamics of Intrinsic Anomalous Hall Effect in the Topological Antiferromagnet ${\mathrm{Mn}}_{3}\mathrm{Sn}$

Ultrafast Dynamics of Intrinsic Anomalous Hall Effect in the Topological Antiferromagnet ${Mn}_{3} Sn$

Takuya Matsuda, Tomoya Higo, Takashi Koretsune, Natsuki Kanda, Yoshua Hirai, Hanyi Peng, Takumi Matsuo, Naotaka Yoshikawa, Ryo Shimano, Satoru Nakatsuji, and Ryusuke Matsunaga

Phys. Rev. Lett. 130, 126302 – Published 21 March 2023

Abstract

We investigate ultrafast dynamics of the anomalous Hall effect (AHE) in the topological antiferromagnet ${Mn}_{3} Sn$ with sub-100 fs time resolution. Optical pulse excitations largely elevate the electron temperature up to 700 K, and terahertz probe pulses clearly resolve ultrafast suppression of the AHE before demagnetization. The result is well reproduced by microscopic calculation of the intrinsic Berry-curvature mechanism while the extrinsic contribution is clearly excluded. Our work opens a new avenue for the study of nonequilibrium AHE to identify the microscopic origin by drastic control of the electron temperature by light.

Received 2 December 2022
Accepted 6 February 2023

DOI:https://doi.org/10.1103/PhysRevLett.130.126302

Physics Subject Headings (PhySH)

Anomalous Hall effect

Topological materials

Terahertz spectroscopy

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Takuya Matsuda ^1,*, Tomoya Higo², Takashi Koretsune ³, Natsuki Kanda ¹, Yoshua Hirai ², Hanyi Peng², Takumi Matsuo², Naotaka Yoshikawa ², Ryo Shimano^2,4, Satoru Nakatsuji^1,2,5,6, and Ryusuke Matsunaga ^1,5,†

¹The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
²Department of Physics, The University of Tokyo, Bunkyo-ku, Tokyo, 113-0033, Japan
³Deparment of Physics, Tohoku University, Sendai, 980-8578, Japan
⁴Cryogenic Research Center, The University of Tokyo, Bunkyo-ku, Tokyo, 113-0032, Japan
⁵Trans-scale Quantum Science Institute, The University of Tokyo, Bunkyo-ku, Tokyo, 113-0033, Japan
⁶Institute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins University, Baltimore, 21218 Maryland, USA