Transport theory of metallic B20 helimagnets

Jian Kang and Jiadong Zang
Phys. Rev. B 91, 134401 – Published 1 April 2015
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Abstract

B20 compounds are a class of cubic helimagnets harboring nontrivial spin textures such as spin helices and skyrmions. It has been well understood that the Dzyaloshinskii-Moriya (DM) interaction is the origin of these textures, and the physics behind the DM interaction is the spin-orbit coupling (SOC). However, the SOC shows its effect not only on the spins but also on the electrons. In this paper, we will discuss the effects of the SOC on the electron and spin transports in B20 compounds. An effective Hamiltonian is presented from symmetry analysis, and the spin-orbit coupling therein shows anomalous behaviors in anisotropic magnetoresistance and helical resistance. New effects such as an inverse spin-galvanic effect are proposed, and the origin of the DM interaction is discussed.

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  • Received 20 December 2014

DOI:https://doi.org/10.1103/PhysRevB.91.134401

©2015 American Physical Society

Authors & Affiliations

Jian Kang1,* and Jiadong Zang2,†

  • 1School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
  • 2Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA

  • *jkang@umn.edu
  • jiadongzang@gmail.com

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Issue

Vol. 91, Iss. 13 — 1 April 2015

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