Year: 2026
Type: article
Abstract: We show that the shape of a finite altermagnetic sample can generate a measurable spin polarization, even though these materials exhibit zero net magnetization in the large-system limit. This effect arises from the interplay between anisotropic spin-resolved band structures and the discrete set of allowed electron states in confined geometries. For rectangular samples, unequal dimensions lead to an imbalance between spin populations. We propose transport-based probes to detect this geometry-induced spin polarization, which manifests as characteristic signatures in magnetoresistance. Our results reveal a simple and robust route to controlling spin using sample geometry alone, opening new possibilities for nanoscale spintronic devices based on altermagnets.
Source: Physical Review Materials
DOI: 10.1103/8ntv-rwyn
Author: Abhiram Soori
Institution: University of Hyderabad
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Award: G3181870834
OpenAlex ID: W7152701136
FWCI:
Cites:
Cited by:
Related to: