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The Pressure Effects on Electronic Structure of Iron Chalcogenide Superconductors FeSe_{1-x}Te_x

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Ciechan A., Winiarski M., Samsel-Czekała M.
Acta Physica Polonica A
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2012
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vol. 121
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issue 4
820-823
EN
We study the electronic structure of iron-based superconductors FeSe_{1-x}Te_x within the density functional theory. We pay particular attention to the pressure effects on the Fermi surface (FS) topology, which seem to be correlated with a critical superconducting temperature T_C of iron chalcogenides and pnictides. A reduction of the FS nesting between hole and electron cylinders with increasing pressure is observed, which can lead to higher values of T_C. The tellurium substitution into selenium sites yields FS changes similar to the pressure effect.
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