Relationship between Structure and Superconductivity in FeSe1-xTex
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概要
- 論文の詳細を見る
We determined the crystal structural parameters of FeSe1-xTex ($x=0.5$, 0.625, 0.75, 0.875) and FeSe by using the neutron powder diffraction technique. It was found that the superconducting transition temperature $T_{\text{c}}$ of FeSe1-xTex increased with the (Se,Te)–Fe–(Se,Te) bond angle $\alpha$ in the Te-doped samples. However, $T_{\text{c}}$ of FeSe did not exhibit a similar relation. In order to explain this contradiction, we studied the temperature dependence of the $z$ position of chalcogens, which is strongly coupled to the spin fluctuation by theoretical calculations. The $z$ position in FeSe showed a remarkable shift, indicating that strong spin fluctuation can affect the superconductivity in FeSe.
- Physical Society of Japanの論文
- 2009-07-15
著者
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Hiraka Haruhiro
Institute For Materials Research Tohoku University
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Horigane Kazumasa
Wpi-aimr Tohoku University
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Ohoyama Kenji
Institute For Materials Of Physics Tohoku University
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Horigane Kazumasa
WPI-AIMR, Tohoku University, Sendai 980-8577
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