APS Global Physics Summit Logo March 16–21, 2025, Anaheim, CA and virtual
Focus Session
March

Thin Film and Nanostructures of Topological Materials

3:00 pm – 5:48 pm, Monday March 17 Session MAR-C38 Anaheim Convention Center, 261A (Level 2)
Chair:
Jason Hoffman, Harvard University
Topics:
Sponsored by
DMP

Contrasting in-plane anomalous Hall response observed in EuA2Sb2 (A=Zn, Cd) thin films

5:00 pm – 5:12 pm
Presenter: Hsiang Lee (Department of Physics, Institute of Science Tokyo)
Authors: Shinichi Nishihaya (Department of Physics, Institute of Science Tokyo), Hiroaki Ishizuka (Department of Physics, Institute of Science Tokyo), Markus Kriener (RIKEN Center for Emergent Matter Science (CEMS)), Jun Fujioka (Department of Materials Science, University of Tsukuba), Ayano Nakamura (Department of Physics, Institute of Science Tokyo), Yuto Watanabe (Department of Physics, Institute of Science Tokyo), Masaki Uchida (Department of Physics, Institute of Science Tokyo)

Recent observation of the in-plane anomalous Hall effect in magnetic Weyl semimetal EuCd2Sb2, with a trigonal lattice structure, has attracted interest in how an in-plane field can generate out-of-plane orbital magnetization [1]. In this work, we focus on EuZn2Sb2, a sister compound of EuCd2Sb2, to show how the in-plane anomalous Hall effect is sensitive to changes in the band structure and its quantum geometry. When measuring the Hall resistivity while rotating the field within the (001) plane of EuZn2Sb2 film, we see a clear three-fold component corresponding to the in-plane anomalous Hall effect, along with a two-fold component from the planar Hall effect. The in-plane anomalous Hall effect in EuZn2Sb2 behaves differently from EuCd2Sb2, especially in the sign and non-monotonic field dependences. This difference can be explained by model calculations with different band inversion parameters. Our results suggest that designing orbital magnetization by tuning the band structure will be possible through the observation of the in-plane anomalous Hall effect.

[1] A. Nakamura et al., arXiv:2405.16722 (2024).

PRESENTATIONS (12)