Raman-active phonons in Bi2Sr2Can-1CunO2n+4d (n = 1,2,3) - Phonon assignment and charge redistribution effects

Minoru Osada; Masato Kakihana; Mikael Käll; Lars Börjesson

Raman-active phonons in Bi₂Sr₂Ca_n-1Cu_nO_2n+4d (n = 1,2,3) - Phonon assignment and charge redistribution effects

Minoru Osada, Masato Kakihana, Mikael Käll, Lars Börjesson

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

Abstract

The phonon Raman spectra of Bi₂Sr₂Ca_n-1Cu_nO_2n+4d (n = 1,2,3), high-T_c superconductors have been investigated in a number of single-crystal and polycrystalline samples. From the polarization and doping dependence, and from a comparison with previous reports on other high-T_c cuprates, we identify the A_1g and B_1g symmetry modes that are Raman allowed within the ideal body-centered-tetragonal unit cell. On the basis of the assignments proposed here, we discuss the influence of aliovalent substitutions on the phonon modes in Bi₂Sr_2-xLa_xCuO_6+d and Bi₂Sr₂Ca_1-YY_yCu₂O _8+d. We interpret the observed changes in phonon frequencies and intensities as a combination of internal pressure and charge redistribution effects induced by doping.

Original language	English
Pages (from-to)	2003-2005
Number of pages	3
Journal	Journal of Physics and Chemistry of Solids
Volume	59
Issue number	10-12
Publication status	Published - 1998 Oct
Externally published	Yes

Keywords

A. superconductors
C. Raman spectroscopy
Charge redistribution effects

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Raman-active phonons in Bi2Sr2Can-1CunO2n+4d (n = 1,2,3) - Phonon assignment and charge redistribution effects",

abstract = "The phonon Raman spectra of Bi2Sr2Can-1CunO2n+4d (n = 1,2,3), high-Tc superconductors have been investigated in a number of single-crystal and polycrystalline samples. From the polarization and doping dependence, and from a comparison with previous reports on other high-Tc cuprates, we identify the A1g and B1g symmetry modes that are Raman allowed within the ideal body-centered-tetragonal unit cell. On the basis of the assignments proposed here, we discuss the influence of aliovalent substitutions on the phonon modes in Bi2Sr2-xLaxCuO6+d and Bi2Sr2Ca1-YYyCu2O 8+d. We interpret the observed changes in phonon frequencies and intensities as a combination of internal pressure and charge redistribution effects induced by doping.",

keywords = "A. superconductors, C. Raman spectroscopy, Charge redistribution effects",

author = "Minoru Osada and Masato Kakihana and Mikael K{\"a}ll and Lars B{\"o}rjesson",

year = "1998",

month = oct,

language = "English",

volume = "59",

pages = "2003--2005",

journal = "Journal of Physics and Chemistry of Solids",

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T1 - Raman-active phonons in Bi2Sr2Can-1CunO2n+4d (n = 1,2,3) - Phonon assignment and charge redistribution effects

AU - Osada, Minoru

AU - Kakihana, Masato

AU - Käll, Mikael

AU - Börjesson, Lars

PY - 1998/10

Y1 - 1998/10

N2 - The phonon Raman spectra of Bi2Sr2Can-1CunO2n+4d (n = 1,2,3), high-Tc superconductors have been investigated in a number of single-crystal and polycrystalline samples. From the polarization and doping dependence, and from a comparison with previous reports on other high-Tc cuprates, we identify the A1g and B1g symmetry modes that are Raman allowed within the ideal body-centered-tetragonal unit cell. On the basis of the assignments proposed here, we discuss the influence of aliovalent substitutions on the phonon modes in Bi2Sr2-xLaxCuO6+d and Bi2Sr2Ca1-YYyCu2O 8+d. We interpret the observed changes in phonon frequencies and intensities as a combination of internal pressure and charge redistribution effects induced by doping.

AB - The phonon Raman spectra of Bi2Sr2Can-1CunO2n+4d (n = 1,2,3), high-Tc superconductors have been investigated in a number of single-crystal and polycrystalline samples. From the polarization and doping dependence, and from a comparison with previous reports on other high-Tc cuprates, we identify the A1g and B1g symmetry modes that are Raman allowed within the ideal body-centered-tetragonal unit cell. On the basis of the assignments proposed here, we discuss the influence of aliovalent substitutions on the phonon modes in Bi2Sr2-xLaxCuO6+d and Bi2Sr2Ca1-YYyCu2O 8+d. We interpret the observed changes in phonon frequencies and intensities as a combination of internal pressure and charge redistribution effects induced by doping.

KW - A. superconductors

KW - C. Raman spectroscopy

KW - Charge redistribution effects

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VL - 59

SP - 2003

EP - 2005

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

SN - 0022-3697

IS - 10-12

ER -

Raman-active phonons in Bi₂Sr₂Ca_n-1Cu_nO_2n+4d (n = 1,2,3) - Phonon assignment and charge redistribution effects

Abstract

Keywords

ASJC Scopus subject areas

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