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- W2016172689 abstract "Polaronic features similar to those previously observed in the photoinduced spectra of cuprates have been detected in the reflectivity spectra of chemically doped parent compounds of high-critical-temperature superconductors, both n type and p type. In ${mathrm{Nd}}_{2}$${mathrm{CuO}}_{4mathrm{ensuremath{-}}mathit{y}}$ these features, whose intensities depend both on doping and temperature, include local vibrational modes in the far infrared and a broad band centered at ensuremath{sim} 1000 ${mathrm{cm}}^{mathrm{ensuremath{-}}1}$. The latter band is produced by the overtones of two (or three) local modes and is well described in terms of a small-polaron model, with a binding energy of about 500 ${mathrm{cm}}^{mathrm{ensuremath{-}}1}$. Most of the above infrared features are shown to survive in the metallic phase of ${mathrm{Nd}}_{2mathrm{ensuremath{-}}mathit{x}}$${mathrm{Ce}}_{mathit{x}}$${mathrm{CuO}}_{4mathrm{ensuremath{-}}mathit{y}}$, ${mathrm{Bi}}_{2}$${mathrm{Sr}}_{2}$${mathrm{CuO}}_{6}$, and ${mathrm{YBa}}_{2}$${mathrm{Cu}}_{3}$${mathrm{O}}_{7mathrm{ensuremath{-}}mathit{y}}$, where they appear as extra-Drude peaks. The occurrence of polarons is attributed to local modes strongly coupled to carriers, as shown by a comparison with tunneling results. textcopyright{} 1996 The American Physical Society." @default.
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- W2016172689 date "1996-02-01" @default.
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- W2016172689 title "Polaronic optical absorption in electron-doped and hole-doped cuprates" @default.
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- W2016172689 doi "https://doi.org/10.1103/physrevb.53.2756" @default.
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