Pre-K-edge structure on anomalous X-ray scattering in LaMnO3

被引：31

作者：

Takahashi, M ^{[1
]}

Igarashi, J

Fulde, P

机构：

[1] Gunma Univ, Fac Engn, Kiryu, Gumma 3768515, Japan

[2] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2000年 / 69卷 / 06期

关键词：

resonant X-ray scattering; LaMnO3; pre-peak of the K-edge; quadrupole transition; cooperative Jahn-Teller effect; orbital ordering;

D O I：

10.1143/JPSJ.69.1614

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the pre-it-edge structure of the resonant X-ray scattering fur forbidden reflections (anomalous scattering) in LaMnO3, using the band structure calculation based on the local density approximation. We find a two-peak structure with an intensity approximately 1/100 that of the main peak. This originates from a mixing of Ip states of Mn to 3d states of neighbouring Mn sites. The effect is enhanced by an interference with the tail of the main peak. The effect of the quadrupole transition is found to be one order of magnitude smaller than that of the dipole transition. slightly modifying the azimuthal-angle dependence.

引用

页码：1614 / 1617

页数：4

共 22 条

[1] Critical reexamination of the experimental evidence of orbital ordering in LaMnO3 and La0.5Sr1.5MnO4 [J].