Low-q dispersion of transverse acoustic phonons in YBa$_2$Cu$_3$O$_{7-δ}$

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dc.creatorGauzzi, Andrea
dc.creatorD'Astuto, Matteo
dc.creatorLicci, Francesca
dc.creatorBossak, Alexei
dc.creatorKrisch, Michael
dc.date2004-11-04
dc.date.accessioned2026-07-07T03:01:53Z
dc.date.available2026-07-07T03:01:53Z
dc.descriptionHigh-resolution ($ΔE$=1.3 meV) inelastic X-ray scattering (IXS) in optimally doped untwinned YBa$_2$Cu$_3$O$_{7-δ}$ 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.
dc.identifierhttps://arxiv.org/abs/cond-mat/0411120
dc.identifierhttp://arxiv.org/abs/cond-mat/0411120
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25208
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleLow-q dispersion of transverse acoustic phonons in YBa$_2$Cu$_3$O$_{7-δ}$
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