Visualizing band selective enhancement of quasiparticle lifetime in a metallic ferromagnet.

ABSTRACT: Electrons navigate more easily in a background of ordered magnetic moments than around randomly oriented ones. This fundamental quantum mechanical principle is due to their Bloch wave nature and also underlies ballistic electronic motion in a perfect crystal. As a result, a paramagnetic metal that develops ferromagnetic order often experiences a sharp drop in the resistivity. Despite the universality of this phenomenon, a direct observation of the impact of ferromagnetic order on the electronic quasiparticles in a magnetic metal is still lacking. Here we demonstrate that quasiparticles experience a significant enhancement of their lifetime in the ferromagnetic state of the low-density magnetic semimetal EuCd₂As₂, but this occurs only in selected bands and specific ene

SUBMITTER: Jo NH 

PROVIDER: S-EPMC8660887 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature