RAMAN-ACTIVE PHONON SOFTENING IN A TL-BA-CA-CU-O SUPERCONDUCTING THIN-FILM

RAMAN-ACTIVE PHONON SOFTENING IN A TL-BA-CA-CU-O SUPERCONDUCTING THIN-FILM

We report on a Raman scattering study of a large-area spray pyrolysed TlBaCaCuO superconducting thin film (Tc = 111 K). We have analysed the temperature dependence of the lineshape of the apical and bridging oxygen vibration (A1g) modes taken from an intimate mixture of TBCCO-1223 and -2223 crystall...

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প্রধান লেখক: Mukherjee, A, Liu, D, Boothroyd, A, Su, L, Grovenor, C, Goringe, M
বিন্যাস: Journal article
ভাষা:English
প্রকাশিত: 1995
বিবরন
সংক্ষিপ্ত:We report on a Raman scattering study of a large-area spray pyrolysed TlBaCaCuO superconducting thin film (Tc = 111 K). We have analysed the temperature dependence of the lineshape of the apical and bridging oxygen vibration (A1g) modes taken from an intimate mixture of TBCCO-1223 and -2223 crystallites and have found evidence for anomalous phonon self-energy effects at or near the critical transition temperature. Possible mechanisms that could account for this behaviour are discussed. © 1995.

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