Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session B43: Dirac and Weyl Semimetal: Magnetism and Optics
11:30 AM–2:30 PM,
Monday, March 6, 2023
Room: Room 317
Sponsoring
Unit:
DMP
Chair: Chaowei Hu, University of Washington, Seattle
Abstract: B43.00008 : Anomalous Hall effect in an antiferromagnetic Weyl semimetal*
1:18 PM–1:30 PM
Presenter:
Yuxiang Gao
(Rice University)
Authors:
Yuxiang Gao
(Rice University)
Shiming Lei
(Rice university)
Yichen Zhang
(Rice University)
Ming Yi
(Rice University)
Emilia Morosan
(Rice Univ)
Here we focus on another Weyl semimetal of the LaPtSi type, and we report the observation of large anomalous Hall conductivity (AHC) (~102 Ohm-1 cm-1). In this compound, the AHC increases monotonically on cooling and persists in both the AFM and the PM state up to 100 K. Analysis of our angle-dependent quantum oscillation measurements shows strong evidence of the Weyl pockets close to the Fermi energy in both the AFM and the PM state. Combined with the good conductivity (~104 Ohm-1 cm-1), this points to an intrinsic origin of the AHE. We propose a picture for the evolution of the Weyl node under a magnetic field to qualitatively explain the temperature dependence of AHC in our compound.
[1] Shekar, C., et al. PNAS. 115,37 9140-9144. (2018)
[2] Nakatsuji, S., et al. Nature. 527, 212-215. (2016)
[3] Chen, H., et al. Phys. Rev. Lett. 112,017205. (2014)
*This worked is funded by Air Force of Scientific Research Grant 13364873.
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