Ba 2 Y Cu 3 O 7 − δ : Electrodynamics of Crystals with High Reflectivity
作者： G. A. Thomas , J. Orenstein , D. H. Rapkine , M. Capizzi , A. J. Millis
DOI: 10.1103/PHYSREVLETT.61.1313
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摘要: We present results for the reflectivity, $R$ of two bulk crystals ${\mathrm{Ba}}_{2}\mathrm{Y}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\ensuremath{-}\ensuremath{\delta}}$ which, below superconducting transition at ${T}_{c}$, show behavior consistent with perfect reflectivity up to an energy $(3\ensuremath{-}4){k}_{\mathrm{B}}{T}_{c}$. interpret reproducibility and high values (especially $R\ensuremath{\sim}1$ ${T}_{c}$) as indicative intrinsic in highly conducting crystal planes probed by light. Results above ${T}_{c}$ that charge carriers have enhanced effective mass low scattering rate frequency temperature, indicating a strong interaction some excitation.
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