High Resolution Inelastic Neutron Scattering Study of Phonon Seli-Energy Effects in YBCO
نویسنده
چکیده
We report preliminary results of the high resolution melastic neutron scattering measurements of the 42.5 meV optical phonon branch in YBCO, whose behavior at momentum transfer q=0 has been extensively studied by Raman scattering. The experiment was done on a large (75g) single crystal of YBa2Cu307-x (Tc~90K) with the resolution of 2 meV (full width at half maximum). In cooling from 100K to 50K we observe a small softening of the phonon energy at q=0.25,0.25,0, but no significant linewidth change.
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تاریخ انتشار 2002