Spin-orbit coupling induced orbital entanglement in a three-band Hubbard model

被引：0
|
作者：
Igoshev, Petr A. [1 ]
Chizhov, Danil E. [2 ]
Irkhin, Valentin Yu. [1 ]
Streltsov, Sergey V. [1 ,2 ]
机构：
[1] Inst Met Phys, S Kovalevskaya St 18, Ekaterinburg 620108, Russia
[2] Ural Fed Univ, Dept Theoret Phys & Appl Math, Mira St 19, Ekaterinburg 620002, Russia
来源：
PHYSICAL REVIEW B | 2024年 / 110卷 / 11期
基金：
俄罗斯科学基金会;
关键词：
INSULATOR-TRANSITION; MAGNETIC-STRUCTURE; APPROXIMATION; SYSTEMS;
D O I：
10.1103/PhysRevB.110.115110
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of the spin-orbit coupling on the ground state properties of the square-lattice three-band Hubbard model with a single electron per site is studied by a generalized Hartree-Fock approximation. We calculate the full phase diagram and show that there appear additional orbital-entangled phases brought about by competition of various exchange channels or by the spin-orbit coupling in addition to conventional states stabilized by the Kugel-Khomskii mechanism. One of these phases previously proposed to explain magnetic properties of Sr2VO4 is characterized by vanishing dipolar magnetic moments and antiferro-octupolar ordering. We calculated microscopic parameters for this material and demonstrate that it is located near a phase boundary of two orbital-entangled and two conventional antiferromagnetic ferro-orbital states.
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页数：14
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