Spin textures and spin-wave excitations in doped Dirac-Weyl semimetals

Yasufumi Araki, Kentaro Nomura

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We study correlations and magnetic textures of localized spins, doped in three-dimensional Dirac semimetals. An effective field theory for magnetic moments is constructed by integrating out the fermionic degrees of freedom. The spin correlation shows a strong anisotropy, originating from spin-momentum locking of Dirac electrons, in addition to the conventional Heisenberg-like ferromagnetic correlation. The anisotropic spin correlation allows topologically nontrivial magnetic excitation textures such as a transient hedgehog state, as well as the ferromagnetic ground state. The spin-wave dispersion in ferromagnetic Weyl semimetal also becomes anisotropic, being less dispersed perpendicular to the magnetization.

Original languageEnglish
Article number094438
JournalPhysical Review B
Volume93
Issue number9
DOIs
Publication statusPublished - 2016 Mar 31

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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