Neutron scattering study of correlated phase behavior in Sr2IrO4

被引：91

作者：

Dhital, Chetan ^{[1
]}

Hogan, Tom ^{[1
]}

Yamani, Z. ^{[2
]}

de la Cruz, Clarina ^{[3
]}

Chen, Xiang ^{[1
]}

Khadka, Sovit ^{[1
]}

Ren, Zhensong ^{[1
]}

Wilson, Stephen D. ^{[1
]}

机构：

[1] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA

[2] CNR, Canadian Neutron Beam Ctr, Chalk River, ON K0J 1P0, Canada

[3] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 14期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.87.144405

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Neutron diffraction measurements exploring the magnetic and structural phase behaviors of the candidate J(eff) = 1/2 Mott insulating iridate Sr2IrO4 are presented. Comparisons are drawn between the correlated magnetism in this single-layer system and its bilayer analog Sr3Ir2O7, where both materials exhibit magnetic domains originating from crystallographic twinning and comparable moment sizes. Weakly temperature-dependent superlattice peaks violating the reported tetragonal space group of Sr2IrO4 are observed, supporting the notion of a lower structural symmetry arising from a high-temperature lattice distortion, and we use this to argue that moments orient along a unique in-plane axis demonstrating an orthorhombic symmetry in the resulting spin structure. Our results demonstrate that the correlated spin order and structural phase behaviors in both single-layer and bilayer Srn+1IrnO3n+1 systems are remarkably similar and suggest comparable correlation strengths in each system. DOI: 10.1103/PhysRevB.87.144405

引用

页数：5

共 23 条

[1] Ab initio Studies on the Interplay between Spin-Orbit Interaction and Coulomb Correlation in Sr2IrO4 and Ba2IrO4 [J].