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Title: Highly Anisotropic Anomaly in the Dispersion of the Copper-Oxygen Bond-Bending Phonon in Superconducting YBa2Cu3O7 from Inelastic Neutron Scattering
Authors: Raichle, M
Reznik, D
Lamago, D
Heid, R
Li, Y
Bakr, M
Ulrich, C
Hinkov, V
Hradil, K
Lin, CT
Keimer, B
Keywords: Superconductors
Oxides
Spin
Symmetry
Layers
Neutrons
Issue Date: 19-Oct-2011
Publisher: American Physical Society
Citation: Raichle, M., Reznik, D., Lamago, D., Heid, R., Li, Y., Bakr, M., Ulrich, C., Hinkov, V., Hradil, K., Lin, C. T., & Keimer, B. (2011). Highly Anisotropic Anomaly in the Dispersion of the Copper-Oxygen Bond-Bending Phonon in Superconducting YBa2Cu3O7 from Inelastic Neutron Scattering. Physical Review Letters, 107(17), Article Number 177004. doi:10.1103/PhysRevLett.107.177004
Abstract: Motivated by predictions of a substantial contribution of the "buckling'' vibration of the CuO2 layers to d-wave superconductivity in the cuprates, we have performed an inelastic neutron scattering study of this phonon in an array of untwinned crystals of YBa2Cu3O7. The data reveal a pronounced softening of the phonon at the in-plane wave vector q = (0, 0.3) upon cooling below similar to 105 K, but no corresponding anomaly at q = (0.3,0). Based on the observed in-plane anisotropy, we argue that the electron-phonon interaction responsible for this anomaly supports an electronic instability associated with a uniaxial charge-density modulation and does not mediate d-wave superconductivity. © 2011, American Physical Society.
URI: http://dx.doi.org/10.1103/PhysRevLett.107.177004
http://apo.ansto.gov.au/dspace/handle/10238/5540
ISSN: 0031-9007
Appears in Collections:Journal Articles

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