Work

Symmetry-resolved magnetoelastoresistance in multivalley bismuth

Year: 2025

Type: article

Abstract: We report a symmetry-resolved study of longitudinal magnetoelastoresistance (MER) in the multivalley material bismuth, with the current, uniaxial stress, and magnetic field all applied along the binary axis. The magnitude of MER exhibits a steep increase at low magnetic fields, reaches a peak, and then gradually decreases at higher fields. By decomposing the strain response into symmetric and antisymmetric symmetry channels, we reveal contrasting magnetic field dependencies. Despite the overall non-monotonic field dependence of the MER, the symmetric component remains nearly constant under magnetic fields, suggesting that the valleys in bismuth preserve a rigid-band nature against strain even in the presence of a magnetic field. In contrast, the antisymmetric component, associated with mobility anisotropy, dominates the MER response in a magnetic field. At low magnetic fields, the applied field effectively modifies the apparent mobility of each valley, leading to an enhancement in the magnitude of the antisymmetric MER. At higher fields, field-induced valley polarization further modifies this mobility anisotropy by altering the contributions from each valley's mobility, accounting for the moderate suppression of the MER. These findings demonstrate that symmetry-resolved MER serves as a powerful probe of valley-dependent electronic states and provides a fundamental platform for understanding the interplay between magnetic field, strain, and charge transport.

Source: Physical review. B./Physical review. B

DOI: 10.1103/m487-t6f3

Authors: Suguru Hosoi, Fumu Tachibana, Mai Sakaguchi, Kentaro Ishida, Masaaki Shimozawa, Koichi Izawa, Yuki Fuseya, Yuto Kinoshita, Masashi Tokunaga

Institutions: Los Alamos National Laboratory, The University of Osaka, University of Electro-Communications, Kobe University, The University of Tokyo

Language: English

Topic: 2D Materials and Applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: Toyota Physical and Chemical Research Institute, Japan Society for the Promotion of Science, Los Alamos National Laboratory