Macroscopic Quantum Tunneling of a Topological Ferromagnet.

ABSTRACT: The recent advent of topological states of matter spawned many significant discoveries. The quantum anomalous Hall (QAH) effect is a prime example due to its potential for applications in quantum metrology, as well as its influence on fundamental research into the underlying topological and magnetic states and into axion electrodynamics. Here, electronic transport studies on a (V,Bi,Sb)₂ Te₃ ferromagnetic topological insulator nanostructure in the QAH regime are presented. This allows access to the dynamics of an individual ferromagnetic domain. The domain size is estimated to be in the 50-100 nm range. Telegraph noise resulting from the magnetization fluctuations of this domain is observed in the Hall signal. Careful analysis of the influence of temperature and exter

SUBMITTER: Fijalkowski KM 

PROVIDER: S-EPMC10401085 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature