Locking of iridium magnetic moments to the correlated rotation of oxygen octahedra in Sr2IrO4 revealed by x-ray resonant scattering

被引：92

作者：

Boseggia, S. ^{[1
,2
,3
]}

Walker, H. C. ^{[4
]}

Vale, J. ^{[1
,2
]}

Springell, R. ^{[6
]}

Feng, Z. ^{[1
,2
]}

Perry, R. S. ^{[7
]}

Sala, M. Moretti ^{[8
]}

Ronnow, H. M. ^{[5
]}

Collins, S. P. ^{[3
]}

McMorrow, D. F. ^{[1
,2
,9
]}

机构：

[1] UCL, London Ctr Nanotechnol, London WC1E 6BT, England

[2] UCL, Dept Phys & Astron, London WC1E 6BT, England

[3] Diamond Light Source Ltd, Didcot OX11 0DE, Oxon, England

[4] Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany

[5] Ecole Polytech Fed Lausanne, ICMP, Lab Quantum Magnetism, CH-1015 Lausanne, Switzerland

[6] Univ Bristol, Interface Anal Ctr, Royal Commiss Exhibit 1851, Bristol BS2 8BS, Avon, England

[7] Univ Edinburgh, Scottish Univ Phys Alliance, Sch Phys, Edinburgh EH9 3JZ, Midlothian, Scotland

[8] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[9] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2013年 / 25卷 / 42期

基金：

英国工程与自然科学研究理事会;

关键词：

POLARIZATION DEPENDENCE;

D O I：

10.1088/0953-8984/25/42/422202

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Sr2IrO4 is a prototype of the class of Mott insulators in the strong spin-orbit interaction (SOI) limit described by a J(eff) = 1/2 ground state. In Sr2IrO4, the strong SOI is predicted to manifest itself in the locking of the canting of the magnetic moments to the correlated rotation by 11.8(1)degrees of the oxygen octahedra that characterizes its distorted layered perovskite structure. Using x-ray resonant scattering at the Ir L-3 edge we have measured accurately the intensities of Bragg peaks arising from different components of the magnetic structure. From a careful comparison of integrated intensities of peaks due to basal-plane antiferromagnetism, with those due to b-axis ferromagnetism, we deduce a canting of the magnetic moments of 12.2(8)degrees. We thus confirm that in Sr2IrO4 the magnetic moments rigidly follow the rotation of the oxygen octahedra, indicating that, even in the presence of significant non-cubic structural distortions, it is a close realization of the J(eff) = 1/2 state.

引用

页数：5

共 24 条

[1] POLARIZATION DEPENDENCE OF MAGNETIC-X-RAY SCATTERING [J].

BLUME, M ;

GIBBS, D .

PHYSICAL REVIEW B, 1988, 37 (04) :1779-1789

[2] Robustness of Basal-Plane Antiferromagnetic Order and the Jeff=1/2 State in Single-Layer Iridate Spin-Orbit Mott Insulators [J].

Boseggia, S. ;

Springell, R. ;

Walker, H. C. ;

Ronnow, H. M. ;

Rueegg, Ch. ;

Okabe, H. ;

Isobe, M. ;

Perry, R. S. ;

Collins, S. P. ;

McMorrow, D. F. .

PHYSICAL REVIEW LETTERS, 2013, 110 (11)

[3] Antiferromagnetic order and domains in Sr3Ir2O7 probed by x-ray resonant scattering [J].

Boseggia, S. ;

Springell, R. ;

Walker, H. C. ;

Boothroyd, A. T. ;

Prabhakaran, D. ;

Wermeille, D. ;

Bouchenoire, L. ;

Collins, S. P. ;

McMorrow, D. F. .

PHYSICAL REVIEW B, 2012, 85 (18)

[4] Kitaev-Heisenberg Model on a Honeycomb Lattice: Possible Exotic Phases in Iridium Oxides A2IrO3 [J].

Chaloupka, Jiri ;

Jackeli, George ;

Khaliullin, Giniyat .

PHYSICAL REVIEW LETTERS, 2010, 105 (02)

[5] The magnetic motif and the wavefunction of Kramers ions in strontium iridate (Sr2IrO4) [J].

Chapon, L. C. ;

Lovesey, S. W. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2011, 23 (25)

[6] Giant magnetoelectric effect in the Jeff=1/2 Mott insulator Sr2IrO4 [J].

Chikara, S. ;

Korneta, O. ;

Crummett, W. P. ;

DeLong, L. E. ;

Schlottmann, P. ;

Cao, G. .

PHYSICAL REVIEW B, 2009, 80 (14)

[7] STRUCTURAL AND MAGNETIC STUDIES OF SR2IRO4 [J].

CRAWFORD, MK ;

SUBRAMANIAN, MA ;

HARLOW, RL ;

FERNANDEZBACA, JA ;

WANG, ZR ;

JOHNSTON, DC .

PHYSICAL REVIEW B, 1994, 49 (13) :9198-9201

[8] Neutron scattering study of correlated phase behavior in Sr2IrO4 [J].

Dhital, Chetan ;

Hogan, Tom ;

Yamani, Z. ;

de la Cruz, Clarina ;

Chen, Xiang ;

Khadka, Sovit ;

Ren, Zhensong ;

Wilson, Stephen D. .

PHYSICAL REVIEW B, 2013, 87 (14)

[9] Lattice-driven magnetoresistivity and metal-insulator transition in single-layered iridates [J].

Ge, M. ;

Qi, T. F. ;

Korneta, O. B. ;

De Long, D. E. ;

Schlottmann, P. ;

Crummett, W. P. ;

Cao, G. .

PHYSICAL REVIEW B, 2011, 84 (10)

[10] Crystal-Field Splitting and Correlation Effect on the Electronic Structure of A2IrO3 [J].

Gretarsson, H. ;

Clancy, J. P. ;

Liu, X. ;

Hill, J. P. ;

Bozin, Emil ;

Singh, Yogesh ;

Manni, S. ;

Gegenwart, P. ;

Kim, Jungho ;

Said, A. H. ;

Casa, D. ;

Gog, T. ;

Upton, M. H. ;

Kim, Heung-Sik ;

Yu, J. ;

Katukuri, Vamshi M. ;

Hozoi, L. ;

van den Brink, Jeroen ;

Kim, Young-June .

PHYSICAL REVIEW LETTERS, 2013, 110 (07)

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