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Electronic Structure of EuMo6Se8 Studied by X-Ray Absorption Spectroscopy |
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| Authors: | K. Asokan O. Peña L. Le Polles J. C. Jan J. W. Chiou W. F. Pong |
| Affiliation: | (1) Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi, 110 067, India;(2) Sciences Chimiques de Rennes, UMR 6226, Université de Rennes 1, Rennes, France;(3) ENS de Chimie de Rennes, Rennes, France;(4) National Synchrotron Radiation Research Center, Hsinchu, 300, Taiwan, ROC;(5) Department of Applied Physics, National University of Kaohsiung, Kaohsiung, 811, Taiwan, ROC;(6) Department of Physics, Tamkang University, Tamsui, 251, Taiwan, ROC |
| Abstract: | The rare-earth based molybdenum chalcogenides, REMo6Se8 (RE = rare-earth metals) have been extensively studied because of their unique crystal structure based on Mo6Se8 clusters and their outstanding properties involving coexistence of superconductivity and magnetism. Among all these compounds, Ce and Eu based chalcogenides are magnetic and non-superconductors and possess many novel properties. Understanding their electronic structure is likely to provide valuable information about these materials. We employ X-ray absorption near-edge structure (XANES) spectroscopy at Mo and Se K-edges of EuMo6Se8 to identify the local environment respectively around Mo and Se ions and XANES spectra at L3-edge of Eu ion to identify their valence state. Results from this study demonstrate that Se ions in EuMo6Se8 are in two inequivalent sites and the valency of Eu is divalent. |
| Keywords: | Chevrel phase compounds Chalcogenides X-ray absorption spectroscopy Eu valence |
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