Fe L2,3-edge x-ray absorption spectroscopy has been used to study the electronic structure of FeSe1-xTex chalcogenides. The spectra are quite similar to those for the metallic Fe and Fe-based pnictides, consistent with weak correlation effects in the chalcogenides. A systematic change in the experimental spectra with Te substitution is observed and well reproduced by cluster calculations. A combined experimental and theoretical analysis reveals decreased hybridization of Fe 3d and chalcogen p states with increasing Te concentration, which could be important for the superconductivity and magnetism of the chalcogenides. © 2011 American Physical Society.
Electronic structure of FeSe1-xTex studied by Fe L2,3-edge x-ray absorption spectroscopy / Saini, Naurang Lal; Y., Wakisaka; B., Joseph; Iadecola, Antonella; S., Dalela; P., Srivastava; E., Magnano; M., Malvestuto; Y., Mizuguchi; Y., Takano; Takashi, Mizokawa; K. B., Garg. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 83:5(2011), pp. 052502_1-052502_4. [10.1103/physrevb.83.052502]
Electronic structure of FeSe1-xTex studied by Fe L2,3-edge x-ray absorption spectroscopy
SAINI, Naurang Lal;IADECOLA, ANTONELLA;
2011
Abstract
Fe L2,3-edge x-ray absorption spectroscopy has been used to study the electronic structure of FeSe1-xTex chalcogenides. The spectra are quite similar to those for the metallic Fe and Fe-based pnictides, consistent with weak correlation effects in the chalcogenides. A systematic change in the experimental spectra with Te substitution is observed and well reproduced by cluster calculations. A combined experimental and theoretical analysis reveals decreased hybridization of Fe 3d and chalcogen p states with increasing Te concentration, which could be important for the superconductivity and magnetism of the chalcogenides. © 2011 American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.