Ingle, Kapil E. and Priolkar, K. R. and Pal, Anand and Zargar, Rayees A. and Awana, V. P. S. and Emura, S. (2015) Importance of structural distortions in enhancement of transition temperature in FeSe1-xTex superconductors. Superconductor Science and Technology, 28 (1). 015015-1- 015015-6. ISSN 0953-2048

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Abstract

Temperature (12 K <= T <= 300 K) dependent extended x-ray absorption fine structure (EXAFS) studies at the Fe K edge in FeSe1-xTex (x = 0, 0.5 and 1.0) compounds have been carried out to understand the reasons for the increase in T-C upon Te doping in FeSe. While local distortions are present near superconducting onset in FeSe and FeSe0.5Te0.5, they seem to be absent in non superconducting FeTe. Of crucial importance is the variation of anion height. In FeSe0.5Te0.5, near the superconducting onset, the two heights, h(Fe-Se) and h(Fe-Te) show a nearly opposite behaviour. These changes indicate a possible correlation between Fe-chalcogen hybridization and the superconducting transition temperature in these Fe-chalcogenides.

Item Type:	Article
Uncontrolled Keywords:	superconductivity, EXAFS, iron based superconductors
Subjects:	Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	23 Sep 2016 10:53
Last Modified:	23 Sep 2016 10:53
URI:	http://npl.csircentral.net/id/eprint/1855

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