Chiral-Bubble-Induced Topological Hall Effect in Ferromagnetic Topological Insulator Heterostructures

Wenbo Wang, Yi Fan Zhao, Fei Wang, Matthew W. Daniels, Cui Zu Chang, Jiadong Zang, Di Xiao, Weida Wu

Research output: Contribution to journalArticlepeer-review

Abstract

We report compelling evidence of an emergent topological Hall effect (THE) from chiral bubbles in a two-dimensional uniaxial ferromagnet, V-doped Sb2Te3 heterostructure. The sign of THE signal is determined by the net curvature of domain walls in different domain configurations, and the strength of THE signal is correlated with the density of nucleation or pinned bubble domains. The experimental results are in good agreement with the integrated linear transport and Monte Carlo simulations, corroborating the emergent gauge field at chiral magnetic bubbles. Our findings not only reveal a general mechanism of THE in two-dimensional ferromagnets but also pave the way for the creation and manipulation of topological spin textures for spintronic applications.

Original languageEnglish (US)
Pages (from-to)1108-1114
Number of pages7
JournalNano letters
Volume21
Issue number2
DOIs
StatePublished - Jan 27 2021

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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