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

Abstract:
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.
Publication status:
Published

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Journal:
SOLID STATE COMMUNICATIONS
Volume:
93
Issue:
9
Pages:
747-752
Publication date:
1995-03-05
DOI:
ISSN:
0038-1098
URN:
uuid:ce676ab2-deab-445f-8871-93e3473197e9
Source identifiers:
13749
Local pid:
pubs:13749

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