X-ray natural circular dichroism in copper metaborate

被引：7
|
作者：
Ovchinnikova, E. N. [1 ]
Rogalev, A. [2 ]
Wilhelm, F. [2 ]
Kozlovskaya, K. A. [1 ]
Oreshko, A. P. [1 ]
Dmitrienko, V. E. [3 ]
机构：
[1] Moscow MV Lomonosov State Univ, Moscow 119991, Russia
[2] European Synchrotron Radiat Facil, CS 40220, F-38043 Grenoble, France
[3] Russian Acad Sci, Shubnikov Inst Crystallog, Leninskii Pr 59, Moscow 119333, Russia
来源：
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 2016年 / 123卷 / 01期
基金：
俄罗斯基础研究基金会;
关键词：
OPTICAL-ACTIVITY; CUB2O4; CRYSTAL;
D O I：
10.1134/S1063776116050186
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The local electronic structure of copper ions in a copper metaborate CuB2O4 crystal is studied on the ESRF synchrotron using X-ray absorption polarization-dependent spectroscopy. The X-ray natural circular dichroism near the K absorption edge of copper is measured in the direction that is perpendicular to crystal axis c. The data obtained indicate the presence of hybridized p-d electronic states of copper. Theoretical calculations are used to separate the contributions of the two crystallographically nonequivalent positions of copper atoms in the unit cell of CuB2O4 to the absorption and X-ray circular dichroism spectra of the crystal.
引用
收藏
页码：27 / 32
页数：6
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