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- W2019401641 abstract "We have measured the optical conductivity $ensuremath{sigma}(ensuremath{omega})$ of ${mathrm{Yb}}_{1ensuremath{-}x}{mathrm{Lu}}_{x}{mathrm{B}}_{12}$ $(0<~x<~1),$ where the system evolves from a Kondo semiconductor at $x=0$ to a nonmagnetic metal at $x=1.$ For $x=0,$ $ensuremath{sigma}(ensuremath{omega})$ exhibits a clear energy gap with an onset at $ensuremath{sim}20 mathrm{meV}$ and a shoulder at 38 meV. As x increases, the gap is rapidly filled in from the bottom, while the shoulder remains at $ensuremath{sim}40 mathrm{meV}$ up to $x=frac{1}{2}.$ These results suggest that Lu substitution into ${mathrm{YbB}}_{12}$ produces an in-gap band, but the characteristic energy for the gap remains unchanged in a wide range of x. Spectral evolutions of a characteristic mid-infrared peak, which results from Yb $4f$-derived states near the Fermi level, suggest a strong coupling of Yb $4f$ electrons with conduction electrons." @default.
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- W2019401641 date "2000-11-15" @default.
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- W2019401641 title "Optical conductivity of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Yb</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Lu</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>B</mml:mi></mml:mrow><…" @default.
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- W2019401641 doi "https://doi.org/10.1103/physrevb.62.r13265" @default.
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