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- W2949641323 abstract "High-resolution ($Delta E$=1.3 meV) inelastic X-ray scattering (IXS) in optimally doped untwinned YBa$_2$Cu$_3$O$_{7-delta}$ single crystals show that the dispersion of transverse acoustic phonons in the a-direction remains linear with no softening due to bending modes in the long wavelength limit, down to q=0.02. The sound velocity is found to be 2700 +/- 70 m s$^{-1}$, in excellent agreement with ultrasound measurements, and unchanged upon cooling from room temperature to 98 K. These results rule out a strong coupling between bending dynamics of the CuO$_2$ planes and charge carriers in cuprates." @default.
- W2949641323 created "2019-06-27" @default.
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- W2949641323 date "2004-11-04" @default.
- W2949641323 modified "2023-09-27" @default.
- W2949641323 title "Low-q dispersion of transverse acoustic phonons in YBa$_2$Cu$_3$O$_{7-delta}$" @default.
- W2949641323 hasPublicationYear "2004" @default.
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