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Strain effects on electronic structure and superconductivity in the iron telluride

Authors
Journal
Intermetallics
0966-9795
Publisher
Elsevier
Volume
52
Identifiers
DOI: 10.1016/j.intermet.2014.03.018
Keywords
  • A. Intermetallics
  • B. Superconducting Properties
  • E. Electronic Structure
  • Calculation
Disciplines
  • Physics

Abstract

Abstract The influence of tensile strain in the ab-plane on crystal and electronic structure of FeTe has been studied ab initio. In superconducting FeSe the Fermi surface nesting with a vector q ∼ (0.5,0.5) × (2π/a) is believed to be crucial for rising superconductivity mediated by spin-fluctuations. The results presented here indicate that tensile-strained FeTe also exhibits such conditions. Furthermore, the Fermi surface changes, related to the increase of the lattice parameter a of this telluride, are opposite to analogous effects reported for FeSe. Since a recently transition from the double-stripe to the single-stripe magnetic order in FeTe under tensile strain in the ab-plane is associated with an occurrence of superconductivity in corresponding thin films, these findings allow for drawing a consistent picture of superconductivity in FeSe1−xTex systems, in general.

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