Polarization and momentum dependence of a charge-transfer excitation in Nd2CuO4

被引：40

作者：

Hämäläinen, K

Hill, JP

Huotari, S

Kao, CC

Berman, LE

Kotani, A

Idé, T

Peng, JL

Greene, RL

机构：

[1] Univ Helsinki, Dept Phys, FIN-00014 Helsinki, Finland

[2] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[3] Brookhaven Natl Lab, NSLS, Upton, NY 11973 USA

[4] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 106, Japan

[5] Univ Maryland, Dept Phys & Astron, Ctr Superconduct Res, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.61.1836

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the polarization and q dependence of 6-eV charge-transfer excitation in Nd2CuO4, as studied by resonant inelastic x-ray scattering. The incident polarization is shown to select the intermediate states participating in the resonant process, and resonances associated with 1s-->4p(sigma) and 1s-->4p(pi) transitions are resolved. No enhancement is observed for the 1s3d(10)L well-screened intermediate states in either case. Numerical calculations show that this is the result of nonlocal effects. The intensity and position of the excitation was found to be independent of the momentum transfer along the c axis for q = 3.5-7.9 Angstrom(-1).

引用

页码：1836 / 1840

页数：5

共 12 条

[1] Resonant inelastic x-ray scattering from valence excitations in insulating copper oxides [J].