X-ray natural circular dichroism in copper metaborate

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• 作者：E. N. Ovchinnikova ; A. Rogalev ; F. Wilhelm…
• 刊名：Journal of Experimental and Theoretical Physics
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：123
• 期：1
• 页码：27-32
• 全文大小：807 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Elementary Particles and Nuclei
  Relativity and Cosmology
  Elementary Particles and Quantum Field Theory
  Solid State Physics and Spectroscopy
  Russian Library of Science
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1090-6509
• 卷排序：123

文摘

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.