標題: Inelastic light scattering studies of overdoped Y1-xCaxBa2Cu3O7-delta thin film
作者: Lin, J. H.
Weng, S. M.
Liu, H. L.
Chung, P. C.
Lin, J. -Y.
物理研究所
Institute of Physics
公開日期: 1-Dec-2007
摘要: The vibrational and magnetic Raman excitation spectra were examined in overdoped Y1-xCaxBa2Cu3O7-delta thin films. Below T-c, certain phonons in undoped YBa2Cu3O7-delta (YBCO) show strong self-energy effects, which gradually vanish with increasing Ca concentration into the overdoped regime. The observed B-1g symmetry two-magnon excitation peak near 2900 cm(-1) in YBCO is significantly broadened, weakened, and shifts to the lower frequency with increasing Ca content, indicating the effective value of magnetic superexchange energy decreases and that the life time of the magrions becomes shorter with increasing hole concentrations. (C) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
URI: http://dx.doi.org/10.1002/pssb.200777110
http://hdl.handle.net/11536/3819
ISSN: 0370-1972
DOI: 10.1002/pssb.200777110
期刊: PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume: 244
Issue: 12
起始頁: 4598
結束頁: 4601
Appears in Collections:Conferences Paper


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