Magnetic excitation spectrum of Na2IrO3 probed with resonant inelastic x-ray scattering

被引：82

作者：

Gretarsson, H. ^{[1
]}

Clancy, J. P. ^{[1
]}

Singh, Yogesh ^{[2
]}

Gegenwart, P. ^{[3
]}

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

Kim, Jungho ^{[5
]}

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

Said, A. H. ^{[5
]}

Casa, D. ^{[5
]}

Gog, T. ^{[5
]}

Kim, Young-June ^{[1
]}

机构：

[1] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada

[2] Indian Inst Sci Educ & Res Mohali, Manauli 140306, PO, India

[3] Univ Gottingen, Inst Phys 1, D-37077 Gottingen, Germany

[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

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 22期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1103/PhysRevB.87.220407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The low energy excitations in Na2IrO3 have been investigated using resonant inelastic x-ray scattering (RIXS). A magnetic excitation branch can be resolved, whose dispersion reaches a maximum energy of about 35 meV at the Gamma point. The momentum dependence of the excitation energy is much larger along the Gamma-X direction compared to that along the Gamma-Y direction. The observed dispersion relation is consistent with a recent theoretical prediction based on the Heisenberg-Kitaev model. At high temperatures, we find large contributions from lattice vibrational modes to our RIXS spectra, suggesting that a strong electron-lattice coupling is present in Na2IrO3.

引用

页数：5

共 36 条

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