Temperature-dependent polarized extended X-ray absorption fine-structure (EXAFS) measurements are made on the superconducting FeSe0.25Te0.75 single crystal. The Fe-Se bond length is found to be significantly shorter than the average crystallographic Fe-Se/Te distance, and almost equal to the one for the system without Te. On the other hand, the Fe-Te bond length is nearly equal to the one known for a binary FeTe system. This suggests that the Se and Te occupy distinct sites in the ternary FeSe0.25Te0.75, indicating the breaking of the average crystal symmetry with locally inhomogeneous atomic distribution.

Determination of local structure in FeSe(0.25)Te(0.75) single crystal by polarized EXAFS / Iadecola, Antonella; B., Joseph; L., Simonelli; Y., Mizuguchi; Y., Takano; Saini, Naurang Lal. - In: EUROPHYSICS LETTERS. - ISSN 0295-5075. - 90:(2010), pp. 67008_1-67008_6. [10.1209/0295-5075/90/67008]

Determination of local structure in FeSe(0.25)Te(0.75) single crystal by polarized EXAFS

IADECOLA, ANTONELLA;SAINI, Naurang Lal
2010

Abstract

Temperature-dependent polarized extended X-ray absorption fine-structure (EXAFS) measurements are made on the superconducting FeSe0.25Te0.75 single crystal. The Fe-Se bond length is found to be significantly shorter than the average crystallographic Fe-Se/Te distance, and almost equal to the one for the system without Te. On the other hand, the Fe-Te bond length is nearly equal to the one known for a binary FeTe system. This suggests that the Se and Te occupy distinct sites in the ternary FeSe0.25Te0.75, indicating the breaking of the average crystal symmetry with locally inhomogeneous atomic distribution.
2010
01 Pubblicazione su rivista::01a Articolo in rivista
Determination of local structure in FeSe(0.25)Te(0.75) single crystal by polarized EXAFS / Iadecola, Antonella; B., Joseph; L., Simonelli; Y., Mizuguchi; Y., Takano; Saini, Naurang Lal. - In: EUROPHYSICS LETTERS. - ISSN 0295-5075. - 90:(2010), pp. 67008_1-67008_6. [10.1209/0295-5075/90/67008]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/365201
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