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

• Authors: A. Ciechan , M. Winiarski , M. Samsel-Czekała
• Languages of publication: EN

Abstracts

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.

Keywords

EN

74.20.Pq; 74.25.Kc; 74.62.F; 74.70.Xa

Discipline

• 74.25.Kc: Phonons
• 74.20.Pq: Electronic structure calculations(for methods of electronic structure calculations, see 71.15.-m)
• 74.70.Xa: Pnictides and chalcogenides

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 4
• Pages: 820-823

Dates

published

2012-04

Contributors

author

A. Ciechan

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

M. Winiarski

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences , ul. Okólna 2, 50-422 Wroclaw, Poland

author

M. Samsel-Czekała

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences , ul. Okólna 2, 50-422 Wroclaw, Poland

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Identifiers

DOI

10.12693/APhysPolA.121.820