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- W2028596226 abstract "We have performed an angle-resolved photoemission spectroscopy study of the new iron-based superconductor ${mathrm{K}}_{0.8}{mathrm{Fe}}_{1.7}{mathrm{Se}}_{2}$ (${T}_{c}ensuremath{sim}30text{ }text{ }mathrm{K}$). Clear band dispersion is observed with the overall bandwidth renormalized by a factor of 2.5 compared to our local density approximation calculations, indicating relatively strong correlation effects. Only an electronlike band crosses the Fermi energy, forming a nearly circular Fermi surface (FS) at $M$ ($ensuremath{pi}$, 0). The holelike band at $ensuremath{Gamma}$ sinks $ensuremath{sim}90text{ }text{ }mathrm{meV}$ below the Fermi energy, with an indirect band gap of 30 meV, to the bottom of the electronlike band. The observed FS topology in this superconductor favors ($ensuremath{pi}$, $ensuremath{pi}$) inter-FS scattering between the electronlike FSs at the $M$ points, in sharp contrast to other iron-based superconductors which favor ($ensuremath{pi}$, 0) inter-FS scattering between holelike and electronlike FSs." @default.
- W2028596226 created "2016-06-24" @default.
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- W2028596226 date "2011-05-03" @default.
- W2028596226 modified "2023-10-14" @default.
- W2028596226 title "Absence of a Holelike Fermi Surface for the Iron-Based<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mi mathvariant=normal>K</mml:mi><mml:mn>0.8</mml:mn></mml:msub><mml:msub><mml:mi>Fe</mml:mi><mml:mn>1.7</mml:mn></mml:msub><mml:msub><mml:mi>Se</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy" @default.
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- W2028596226 doi "https://doi.org/10.1103/physrevlett.106.187001" @default.
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