Superconductivity-Induced Anomalies in c-Axis Polarized Phonon Modes of YBa2Cu3O7 Studied by Neutron Inelastic Scattering

Hiroshi Harashina, Katsuaki Kodama, Shin ichi Shamoto, Masatoshi Sato, Kazuhisa Kakurai, Masakazu Nishi

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25 Citations (Scopus)

Abstract

Superconductivity-induced phonon anomalies have been studied by inelastic neutron scattering for c-axis polarized modes in a single crystal of YBa2Cu3O7. a mode with B2u symmetry, which has out-of-phase motions of crystallographically distinct O(2) and O(3) atoms within a CuO2 plane, apparently exhibits a frequency decrease and a narrowing of the profile width with onset of the superconductivity, while a mode which has in-phase motions of these oxygens with respect to Cu atoms within the CuO2 plane does not show an appreciable anomaly. The (x2−y2)-like symmetry of the superconducting order parameter is suggested by considering recent theoretical arguments.

Original languageEnglish
Pages (from-to)1462-1465
Number of pages4
JournalJournal of the Physical Society of Japan
Volume64
Issue number5
DOIs
Publication statusPublished - 1995 May

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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