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- W2887124511 abstract "The temperature-dependence of the in-plane optical properties of (CaFe$_{1-x}$Pt$_{x}$As)$_{10}$Pt$_{3}$As$_{8}$ have been investigated for the undoped ($x=$0) parent compound, and the optimally-doped ($x=$0.1) superconducting material ($T_{c}simeq$ 12 K) over a wide frequency range. The optical conductivity has been described using two free-carrier (Drude) components, in combination with oscillators to describe interband transitions. At room temperature, the parent compound may be described by a strong, broad Drude term, as well as a narrow, weaker Drude component. Below the structural and magnetic transitions at $simeq$ 96 and 83 K, respectively, strength is transferred from the free-carrier components into a bound excitation at $simeq$ 1000 cm$^{-1}$, and the material exhibits semiconducting-like behavior. In the optimally-doped sample, at room temperature the optical properties are again described by narrow and broad Drude responses comparable to the parent compound; however, below $T^ast simeq$ 100 K, strength from the narrow Drude is transferred into a newly-emergent low-energy peak at $simeq$ 120 cm$^{-1}$, which arises from a localization process, resulting in semiconducting-like behavior. Interestingly, below $T_{c}$, this peak also contributes to the superfluid weight, indicating that some localized electrons condense into Cooper pairs; this observation may provide insight into the pairing mechanism in iron-based superconductors." @default.
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- W2887124511 date "2019-04-23" @default.
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- W2887124511 title "Unravelling the mechanism of the semiconducting-like behavior and its relation to superconductivity in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mo>(</mml:mo><mml:msub><mml:mi>CaFe</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Pt</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:mi>As</mml:mi></mml:mrow><mml:msub><mml:mo>)</mml:mo><mml:mn>10</mml:mn></mml:msub><mml:msub><mml:mi>Pt</mml:mi><mml:mn>3</mml:mn…" @default.
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- W2887124511 doi "https://doi.org/10.1103/physrevb.99.144520" @default.
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