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; Ryusuke Matsunaga

doi:10.1103/PhysRevLett.130.126302

Ultrafast Dynamics of Intrinsic Anomalous Hall Effect in the Topological Antiferromagnet Mn_{3}Sn

Phys Rev Lett. 2023 Mar 24;130(12):126302. doi: 10.1103/PhysRevLett.130.126302.

Authors

Takuya Matsuda¹, Tomoya Higo², Takashi Koretsune³, Natsuki Kanda¹, Yoshua Hirai², Hanyi Peng², Takumi Matsuo², Naotaka Yoshikawa², Ryo Shimano^{2

4}, Satoru Nakatsuji^{1

2

5

6}, Ryusuke Matsunaga^{1

5}

Affiliations

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

PMID: 37027855
DOI: 10.1103/PhysRevLett.130.126302

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.