简介: |
Abstract：Recent topics related to electron transport in the presence of magnetization textures in ferromagnetic metals [1] are discussed focusing on the roles of an emergent effective electromagnetic eld (spin gauge eld) that couples to electron spin [2]. The concept of spin electromagnetic eld was presented in the context of a voltage generated by a canting of a driven domain wall [3], and mathematically rigorous formulation in the adiabatic limit was given by Volovik [4]. The idea of effective gauge eld can be extended to the cases with spin relaxation [5], Rashba interaction [6, 7, 8, 9]. It was recently shown that an antisymmetric exchange interaction (Dzyaloshinskii{Moriya interaction) is caused by the spin gauge eld in the presence of intrinsic spin current [10]. Moreover, optical properties of Rashba conductors such as directional dichroism when a magnetic eld is applied turned out to be described by the effective gauge eld generated by the Rashba interaction [11, 12].
References
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[11] J. Shibata, et al., J. Phys. Soc. Japan, 85, 033701 (2016).
[12] H. Kawaguchi and G. Tatara, cond-mat arXiv:1610.01743. |
