Inelastic light scattering studies of overdoped y1-xCa xBa2Cu3O7-δ thin film

J. H. Lin; S. M. Weng; H. L. Liu; P. C. Chung; J. Y. Lin

doi:10.1002/pssb.200777110

Inelastic light scattering studies of overdoped y_1-xCa _xBa₂Cu₃O_7-δ thin film

J. H. Lin
, S. M. Weng
, H. L. Liu^*
, P. C. Chung
, J. Y. Lin

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

The vibrational and magnetic Raman excitation spectra were examined in overdoped Y_1-xCa_xBa₂Cu₃O _7-δ thin films. Below T_c, certain phonons in undoped YBa₂Cu₃O_7-δ (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 magnons becomes shorter with increasing hole concentrations.

Original language	English
Pages (from-to)	4598-4601
Number of pages	4
Journal	Physica Status Solidi (B) Basic Research
Volume	244
Issue number	12
DOIs	https://doi.org/10.1002/pssb.200777110
Publication status	Published - 2007 Dec

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Inelastic light scattering studies of overdoped y1-xCa xBa2Cu3O7-δ thin film",

abstract = "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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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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ER -

Inelastic light scattering studies of overdoped y_1-xCa _xBa₂Cu₃O_7-δ thin film

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