Structural investigation of the bilayer iridate Sr3Ir2O7

被引：36

作者：

Hogan, Tom ^{[1
,2
]}

Bjaalie, Lars ^{[2
]}

Zhao, Liuyan ^{[3
,4
]}

Belvin, Carina ^{[5
]}

Wang, Xiaoping ^{[6
]}

Van de Walle, Chris G. ^{[2
]}

Hsieh, David ^{[3
,4
]}

Wilson, Stephen D. ^{[2
]}

机构：

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

[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[3] CALTECH, Dept Phys, Pasadena, CA 91125 USA

[4] CALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA

[5] Wellesley Coll, Wellesley, MA 02481 USA

[6] Oak Ridge Natl Lab, Chem & Engn Mat Div, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 13期

基金：

美国国家科学基金会;

关键词：

NEUTRON-DIFFRACTION; CRYSTAL-STRUCTURE;

D O I：

10.1103/PhysRevB.93.134110

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A complete structural solution of the bilayer iridate compound Sr3Ir2O7 presently remains outstanding. Previously reported structures for this compound vary and all fail to explain weak structural violations observed in neutron scattering measurements as well as the presence of a net ferromagnetic moment in the basal plane. In this paper, we present single crystal neutron diffraction and rotational anisotropy second harmonic generation measurements unveiling a lower, monoclinic symmetry inherent to Sr3Ir2O7. Combined with density functional theory, our measurements identify the correct structural space group as No. 15 (C2/c) and provide clarity regarding the local symmetry of Ir4+ cations within this spin-orbit Mott material.

引用

页数：6

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