Inelastic light scattering studies of overdoped y 1-x Ca x Ba 2 Cu 3 O 7-δ thin film

J. H. Lin; S. M. Weng; H. L. Liu; P. C. Chung; Jiunn-Yuan Lin

doi:10.1002/pssb.200777110

Inelastic light scattering studies of overdoped y _1-x Ca _x Ba ₂ Cu ₃ O _7-δ thin film

J. H. Lin, S. M. Weng, H. L. Liu^*, P. C. Chung, Jiunn-Yuan Lin

^*Corresponding author for this work

Institute of Physics

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

Abstract

The vibrational and magnetic Raman excitation spectra were examined in overdoped Y _1-x Ca _x Ba ₂ Cu ₃ O _7-δ thin films. Below T _c , certain phonons in undoped YBa ₂ Cu ₃ O _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
State	Published - 1 Dec 2007

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title = "Inelastic light scattering studies of overdoped y 1-x Ca x Ba 2 Cu 3 O 7-δ thin film",

abstract = " The vibrational and magnetic Raman excitation spectra were examined in overdoped Y 1-x Ca x Ba 2 Cu 3 O 7-δ thin films. Below T c , certain phonons in undoped YBa 2 Cu 3 O 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.",

author = "Lin, {J. H.} and Weng, {S. M.} and Liu, {H. L.} and Chung, {P. C.} and Jiunn-Yuan Lin",

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T1 - Inelastic light scattering studies of overdoped y 1-x Ca x Ba 2 Cu 3 O 7-δ thin film

AU - Lin, J. H.

AU - Weng, S. M.

AU - Liu, H. L.

AU - Chung, P. C.

AU - Lin, Jiunn-Yuan

PY - 2007/12/1

Y1 - 2007/12/1

N2 - The vibrational and magnetic Raman excitation spectra were examined in overdoped Y 1-x Ca x Ba 2 Cu 3 O 7-δ thin films. Below T c , certain phonons in undoped YBa 2 Cu 3 O 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.

AB - The vibrational and magnetic Raman excitation spectra were examined in overdoped Y 1-x Ca x Ba 2 Cu 3 O 7-δ thin films. Below T c , certain phonons in undoped YBa 2 Cu 3 O 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.

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JO - Physica Status Solidi (B): Basic Research

JF - Physica Status Solidi (B): Basic Research

IS - 12

ER -

Inelastic light scattering studies of overdoped y _1-x Ca _x Ba ₂ Cu ₃ O _7-δ thin film

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