Importance of structural distortions in enhancement of transition temperature in FeSe\(_{1-x}\)Te\(_{x}\) superconductors
Temperature (12K \(\le\) T \(\le\) 300K) dependent extended X-ray absorption fine structure (EXAFS) studies at the Fe K edge in FeSe\(_{1-x}\)Te\(_x\) (x = 0, 0.5 and 1.0) compounds have been carried out to understand the reasons for increase in T\(_C\) upon Te doping in FeSe. While local distortion...
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| creator | Ingle, Kapil E Priolkar, K R Zargar, Rayees A Awana, V P S Emura, S |
| description | Temperature (12K \(\le\) T \(\le\) 300K) dependent extended X-ray absorption fine structure (EXAFS) studies at the Fe K edge in FeSe\(_{1-x}\)Te\(_x\) (x = 0, 0.5 and 1.0) compounds have been carried out to understand the reasons for increase in T\(_C\) upon Te doping in FeSe. While local distortions are present near superconducting onset in FeSe and FeSe\(_{0.5}\)Te\(_{0.5}\), they seem to be absent in non superconducting FeTe. Of crucial importance is the variation of anion height. In FeSe\(_{0.5}\)Te\(_{0.5}\), near 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. |
| doi_str_mv | 10.48550/arxiv.1410.6561 |
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While local distortions are present near superconducting onset in FeSe and FeSe\(_{0.5}\)Te\(_{0.5}\), they seem to be absent in non superconducting FeTe. Of crucial importance is the variation of anion height. In FeSe\(_{0.5}\)Te\(_{0.5}\), near 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.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1410.6561</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Fine structure ; Physics - Superconductivity ; Superconductivity ; Tellurium ; Transition temperature ; X ray absorption</subject><ispartof>arXiv.org, 2014-10</ispartof><rights>2014. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). 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| subjects | Fine structure Physics - Superconductivity Superconductivity Tellurium Transition temperature X ray absorption |
| title | Importance of structural distortions in enhancement of transition temperature in FeSe\(_{1-x}\)Te\(_{x}\) superconductors |
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