Colossal negative magnetoresistance in field-induced Weyl semimetal of magnetic half-Heusler compound.

ABSTRACT: The discovery of topological insulators and semimetals triggered enormous interest in exploring emergent electromagnetic responses in solids. Particular attention has been focused on ternary half-Heusler compounds, whose electronic structure bears analogy to the topological zinc-blende compounds while also including magnetic rare-earth ions coupled to conduction electrons. However, most of the research in this system has been in band-inverted zero-gap semiconductors such as GdPtBi, which still does not fully exhaust the large potential of this material class. Here, we report a less-studied member of half-Heusler compounds, HoAuSn, which we show is a trivial semimetal or narrow-gap semiconductor at zero magnetic field but undergoes a field-induced transition to a Weyl semimetal, with a nega

SUBMITTER: Ueda K 

PROVIDER: S-EPMC10564756 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature