TY - JOUR
T1 - Inelastic light scattering studies of overdoped y1-xCa xBa2Cu3O7-δ thin film
AU - Lin, J. H.
AU - Weng, S. M.
AU - Liu, H. L.
AU - Chung, P. C.
AU - Lin, J. Y.
PY - 2007/12
Y1 - 2007/12
N2 - The vibrational and magnetic Raman excitation spectra were examined in overdoped Y1-xCaxBa2Cu3O 7-δ thin films. Below Tc, certain phonons in undoped YBa2Cu3O7-δ (YBCO) show strong self-energy effects, which gradually vanish with increasing Ca concentration into the overdoped regime. The observed B1g 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 magnons becomes shorter with increasing hole concentrations.
AB - The vibrational and magnetic Raman excitation spectra were examined in overdoped Y1-xCaxBa2Cu3O 7-δ thin films. Below Tc, certain phonons in undoped YBa2Cu3O7-δ (YBCO) show strong self-energy effects, which gradually vanish with increasing Ca concentration into the overdoped regime. The observed B1g 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 magnons becomes shorter with increasing hole concentrations.
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U2 - 10.1002/pssb.200777110
DO - 10.1002/pssb.200777110
M3 - Article
AN - SCOPUS:38049184735
SN - 0370-1972
VL - 244
SP - 4598
EP - 4601
JO - Physica Status Solidi (B) Basic Research
JF - Physica Status Solidi (B) Basic Research
IS - 12
ER -