Kitaev-Heisenberg model in a magnetic field: Order-by-disorder and commensurate-incommensurate transitions

被引：32

作者：

Chern, Gia-Wei ^{[1
]}

Sizyuk, Yuriy ^{[2
]}

Price, Craig ^{[3
]}

Perkins, Natalia B. ^{[2
]}

机构：

[1] Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA

[2] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

[3] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

来源：

PHYSICAL REVIEW B | 2017年 / 95卷 / 14期

基金：

美国国家科学基金会;

关键词：

Commensurate-incommensurate transition - Field-induced - Finite temperatures - Heisenberg models - Magnetic phase - Magnetic-field - Mott insulators - Spin-orbit couplings - Temperature phase - Theoretical study;

D O I：

10.1103/PhysRevB.95.144427

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a theoretical study of field-induced magnetic phases in the honeycomb Kitaev-Heisenberg model, which is believed to describe the essential physics of Mott insulators with strong spin-orbit coupling such as A(2)IrO(3) and alpha-RuCl3. We obtain a rich finite temperature phase diagram in which the competition between the Zeeman coupling and thermal fluctuations gives rise to both collinear zigzag phases and noncoplanar magnetic orders. Our large-scale classical Monte Carlo simulations also unveil intriguing commensurate-incommensurate transitions and multiple-Q incommensurate phases at high field. Experimental implications are also discussed.

引用

页数：10

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