Intertwined Topological Phases in TaAs₂ Nanowires with Giant Magnetoresistance and Quantum Coherent Surface Transport.

ABSTRACT: Nanowires (NWs) of topological materials are emerging as an exciting platform to probe and engineer new quantum phenomena that are hard to access in bulk phase. Their quasi-1D geometry and large surface-to-bulk ratio unlock new expressions of topology and highlight surface states. TaAs₂, a compensated semimetal, is a topologically rich material harboring nodal-line, weak topological insulator (WTI), C₂-protected topological crystalline insulator, and Zeeman field-induced Weyl semimetal phases. We report the synthesis of TaAs₂ NWs in situ encapsulated in a dielectric SiO₂ shell, which enable to probe rich magnetotransport phenomena, including metal-to-insulator transition and strong signatures of topologically nontrivial transport at remarkably hi

SUBMITTER: Roy A 

PROVIDER: S-EPMC12271997 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature