Anisotropic softening of magnetic excitations in lightly electron-doped Sr2IrO4

被引：27

作者：

Liu, X. ^{[1
,2
,3
,4
]}

Dean, M. P. M. ^{[4
]}

Meng, Z. Y. ^{[1
,2
]}

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

Qi, T. ^{[6
]}

Gog, T. ^{[5
]}

Cao, Y. ^{[4
]}

Lin, J. Q. ^{[1
,2
]}

Meyers, D. ^{[4
]}

Ding, H. ^{[1
,2
,3
]}

Cao, G. ^{[6
]}

Hill, J. P. ^{[4
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[3] Collaborat Innovat Ctr Quantum Matter, Beijing, Peoples R China

[4] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

[5] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[6] Univ Kentucky, Dept Phys & Astron, Ctr Adv Mat, Lexington, KY 40506 USA

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 24期

基金：

中国国家自然科学基金;

关键词：

MOTT INSULATOR; TEMPERATURE;

D O I：

10.1103/PhysRevB.93.241102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic excitations in electron-doped (Sr1-xLax)(2)IrO4 with x = 0.03 were measured using resonant inelastic x-ray scattering at the IrL3 edge. Although much broadened, well defined dispersivemagnetic excitations were observed. Comparing with the magnetic dispersion from the undoped compound, the evolution of the magnetic excitations upon doping is highly anisotropic. Along the antinodal direction, the dispersion is almost intact. On the other hand, the magnetic excitations along the nodal direction show significant softening. These results establish the presence of strong magnetic correlations in electron-doped (Sr1-xLax)(2)IrO4 with close analogies to the hole-doped cuprates, further motivating the search for high temperature superconductivity in this system.

引用

页数：5

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