BaVS3 probed by V L edge x-ray absorption spectroscopy |
| |
Authors: | Ilakovac V Brookes N B Cezar J Criginski Thakur P Bisogni V Dallera C Ghiringhelli G Braicovich L Bernu S Berger H Forró L Akrap A Hague C F |
| |
Institution: | Université Pierre et Marie Curie, CNRS UMR 7614, LCP-MR, Paris, France. vita.ilakovac-casses@upmc.fr |
| |
Abstract: | Polarization dependent vanadium L edge x-ray absorption spectra of BaVS(3) single crystals are measured in the four phases of the compound. The difference between signals with the polarizations E perpendicular to c and E is parallel to c (linear dichroism) changes with temperature. Besides increasing the intensity of one of the maxima, a new structure appears in the pre-edge region below the metal-insulator transition. More careful examination brings to light that the changes start already with pretransitional charge density wave fluctuations. Simple symmetry analysis suggests that the effect is related to rearrangements in the E(g) and A(1g) states, and is compatible with the formation of four inequivalent V-sites along the V-S chain. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|