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TT: Fachverband Tiefe Temperaturen

TT 33: Symposium: High-Temperature Superconductivity

TT 33.5: Vortrag

Donnerstag, 28. Februar 2008, 15:55–16:10, H 0104

The phonon buckling mode in YBa2Cu3O6+x measured by inelastic neutron scattering — •Markus Raichle1, Dmitry Reznik2, Mohammed Bakr1, Vladimir Hinkov1, Klaudia Hradil3, Daniel Lamago2, Clemens Ulrich1, Markus Bröll1, Philippe Bourges2, Yvan Sidis2, Chengtian Lin1, and Bernhard Keimer11MPI für Festkörperforschung, Stuttgart, Germany — 2Laboratoire Léon Brillouin, Paris, France — 3Universität Göttingen, Göttingen, Germany

Cuk et al. [Phys. Rev. Lett. 93, 117003 (2004)] and Devereaux et al. [Phys. Rev. Lett. 93, 117004 (2004)] relate the antinoidal kink in ARPES measurements with the B1g phonon buckling mode. However, this assumption is controversial as this kink has also been related to the magnetic resonance mode by Kaminski et al. [Phys. Rev. Lett. 86, 1070 (2001)] and Kim et al. [Phys. Rev. Lett. 91, 167002 (2003)]. Until now inelastic neutron scattering measurements on this phonon mode on YBa2Cu3O6+x by Reznik et al. [Phys. Rev. Lett. 75, 2396 (1995)] has only been done on twinned samples for x=1. Here we present high resolution neutron measurements on the buckling mode on YBCO for x=0.6 and x=1.0. These measurements performed at Puma and 1T1 at Saclay have been made on fully detwinned samples. Thus we could show that this phonon mode performes an anisotropic superconductivity-induced interaction with a neighboring phonon mode. Hence these measurements enrich the experimental evidence for superconductivity induced phonon effects in high temperature superconductors.

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DPG-Physik > DPG-Verhandlungen > 2008 > Berlin