Dzyaloshinskii-Moriya interaction mediated by spin-polarized band with Rashba spin-orbit coupling

被引：59
|
作者：
Kundu, A. [1 ]
Zhang, S. [1 ]
机构：
[1] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
来源：
PHYSICAL REVIEW B | 2015年 / 92卷 / 09期
基金：
美国国家科学基金会;
关键词：
DOMAIN-WALLS; WEAK FERROMAGNETISM; DYNAMICS; DRIVEN;
D O I：
10.1103/PhysRevB.92.094434
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Dzyaloshinskii-Moriya interaction (DMI) plays a central role in breaking chiral symmetry of magnetic domain wall structure. The recently observed chiral dependence of domain wall structures in ultrathin magnetic films with perpendicular anisotropy indicates the presence of a strong DMI. We calculate the indirect exchange interaction between magnetic ions mediated by spin-polarized conduction electrons with a Rashba spin-orbit coupling. We find the resulting DMI increases with the spin-orbit coupling strength, but decreases with the spin-polarization of the conduction electrons. The estimated DMI magnitude is comparable to the experimental results.
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收藏
页数：6
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