Orbital excitation in Sr2CuO2Cl2: Resonant inelastic x-ray scattering at the Cu K pre-edge

被引：4
|
作者：
Kim, Jungho [1 ,2 ]
Ellis, D. S. [2 ]
Gog, T. [1 ]
Casa, D. [1 ]
Kim, Young-June [2 ]
机构：
[1] Argonne Natl Lab, Adv Photon Source, XOR, Argonne, IL 60439 USA
[2] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada
来源：
PHYSICAL REVIEW B | 2010年 / 81卷 / 07期
基金：
加拿大自然科学与工程研究理事会;
关键词：
SPECTRA; DEPENDENCE;
D O I：
10.1103/PhysRevB.81.073109
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report resonant inelastic x-ray scattering (RIXS) study of d-d orbital excitations in Sr2CuO2Cl2 utilizing the intermediate state associated with a quadrupole transition. Fourfold azimuthal angle dependence of the pre-edge peak near the Cu K absorption edge confirms that the in-plane pre-edge peak arises from the 1s -> 3d(x2-y2) electric quadrupole transition. When the incident photon energy is tuned to this transition, we observed a RIXS excitation at 2 eV energy loss. This excitation is associated with the d-d excitation of d(x2-y2) -> d(yz,zx) based on the angular dependence of the quadrupole transition-matrix element of the scattered photon.
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页数：4
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