Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session T68: Magnetotransport in Topological Materials II
11:30 AM–2:18 PM,
Thursday, March 17, 2022
Room: Hyatt Regency Hotel -Hyde Park B
Sponsoring Units: DMP GMAG DCMP
Chair: Shafayat Hossain, Princeton University; Shirin Mozaffari, University of Tennessee
Abstract: T68.00003 : Observation of giant anomalous Hall effect in a topological magnet*
11:54 AM–12:06 PM
Jaime M Moya
Jaime M Moya
Kevin J Allen
Here we report the observation of giant AHE in a Eu-based BaAl4 -type compound. Indeed doping on the non-magnetic sublattice tunes the Dirac point to the Fermi level as probed by angle-resolved photoemission measurements. Our magneto-electrical transport measurements show that the onset of the AHE coincides with magnetic order below 20 K, and monotonously increases on cooling. The anomalous Hall conductivity approaches 50x103 (Ohm cm)-1 and the tangent of the Hall angle is close to 0.14 at the lowest measured temperature of 2 K. We discuss possible origins of both the giant AHE and temperature dependence.
*JMM was supported by the National Science Foundation Graduate Research Fellowship under Grant DGE 1842494.
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