Nonadiabatic Berry phase in nanocrystalline magnets

R. Skomski, D. J. Sellmyer

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

It is investigated how a Berry phase is created in polycrystalline nanomagnets and how the phase translates into an emergent magnetic field and into a topological Hall-effect contribution. The analysis starts directly from the spin of the conduction electrons and does not involve any adiabatic Hamiltonian. Completely random spin alignment in the nanocrystallites does not lead to a nonzero emergent field, but a modulation of the local magnetization does. As an explicit example, we consider a wire with a modulated cone angle.

Original languageEnglish (US)
Article number055802
JournalAIP Advances
Volume7
Issue number5
DOIs
StatePublished - May 1 2017

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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