Spin-orbit coupling induced magnetic anisotropy and large spin wave gap in NaOsO3

被引：6

作者：

Singh, Avinash ^{[1
,2
]}

Mohapatra, Shubhajyoti ^{[1
]}

Bhandari, Churna ^{[2
]}

Satpathy, Sashi ^{[2
]}

机构：

[1] Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh, India

[2] Univ Missouri, Dept Phys & Astron, Columbia, MO 65201 USA

来源：

JOURNAL OF PHYSICS COMMUNICATIONS | 2018年 / 2卷 / 11期

关键词：

spin-orbit coupling; magnetic ordering; anisotropy; spin wave; three-orbital model;

D O I：

10.1088/2399-6528/aaef6a

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The role of spin-orbit coupling and Hund's rule coupling on magnetic ordering, anisotropy, and excitations are investigated within a minimal three-orbital model for the 5d(3) compound NaOsO3. Small asymmetry between the magnetic moments for the xy and xz, yz orbitals, arising from the hopping asymmetry generated by OsO6 octahedral tilting and rotation, together with the weak correlation effect, are shown to be crucial for the large SOC induced magnetic anisotropy and spin wave gap observed in this compound. Due to the intrinsic SOC-induced changes in the electronic densities under rotation of the staggered field, their coupling with the orbital energy offset is also found to contribute significantly to the magnetic anisotropy energy.

引用

页数：10