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- W2007756968 abstract "We examine the in-plane thermal conductivity (${mathrm{ensuremath{kappa}}}_{mathit{ab}}$) for different classes of insulating cuprate crystals, and present measurements for ${mathrm{YBa}}_{2}$${mathrm{Cu}}_{3}$${mathrm{O}}_{6+mathit{x}}$ and ${mathrm{PrBa}}_{2}$${mathrm{Cu}}_{3}$${mathrm{O}}_{6+mathit{x}}$ (xensuremath{le}0.11). An unusual, nonmonotonic temperature (T) dependence of ${mathrm{ensuremath{kappa}}}_{mathit{ab}}$, previously observed in ${mathrm{La}}_{2}$${mathrm{CuO}}_{4+mathrm{ensuremath{delta}}}$, is demonstrated to be a characteristic of the 123 compounds as well. This feature signals the onset of anomalous damping for in-plane, heat-carrying phonons at Tensuremath{le}250 K that is highly sensitive to light oxygen doping in ${mathrm{YBa}}_{2}$${mathrm{Cu}}_{3}$${mathrm{O}}_{6+mathit{x}}$. Its absence in ${mathrm{Nd}}_{2}$${mathrm{CuO}}_{4+mathrm{ensuremath{delta}}}$ and similarity to the behavior of ${mathrm{SrTiO}}_{3}$ suggests that the phenomenon in the cuprates is connected with tilt distortions of the CuO polyhedra. We discuss the implications of these results for interpretations of the superconducting-state enhancement of ${mathrm{ensuremath{kappa}}}_{mathit{ab}}$, widely observed in superconducting compounds." @default.
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- W2007756968 title "Anomalous phonon damping and thermal conductivity in insulating cuprates" @default.
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- W2007756968 doi "https://doi.org/10.1103/physrevb.52.r13134" @default.
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