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Title: RAMAN-SCATTERING IN BI2SR2CA1-X(Y,ER,TM)XCU2O8+DELTA SINGLE-CRYSTALS
Authors: BOEKHOLT, M ×
GUNTHERODT, G
LEONYUK, LI
Moshchalkov, Victor #
Issue Date: 1991
Publisher: ELSEVIER SCIENCE BV
Series Title: Physica. C, Superconductivity vol:185 issue:Part 2 pages:1035-1036
Conference: date:MV LOMONOSOV STATE UNIV,DEPT PHYS,HIGH TC SUPERCONDUCT LAB,MOSCOW 119899,USSR
Abstract: Bi2Sr2Ca1-x(Y,Er,Tm)xCu2O8+delta single crystals have been investigated by Raman spectroscopy as a function of doping (0 less-than-or-equal-to x less-than-or-equal-to 0.85), incident laser wavelength, temperature and polarization directions of the incident and scattered light. Compared to undoped Bi2Sr2CaCu2O8+delta, additional phonons are found at 136 cm-1, 187 cm-1, 320 cm-1 and 434 cm-1. In contrast to superconducting samples, the B1g-continuum of electronic scattering is not observed in semiconducting Bi2Sr2Ca1-xYxCu2O8+delta (x greater-than-or-equal-to 0.5), corroborating the identification of narrow (almost-equal-to 60 meV) band-like states near the Fermi energy in superconducting samples. Two-magnon scattering in non-superconducting Bi2Sr2Ca1-x(Y,Er,Tm)xCu2O8+delta (x greater-than-or-equal-to 0.5) gives rise to a broad peak with its maximum at almost-equal-to 2900 cm-1, becoming more intense with increasing x.
ISSN: 0921-4534
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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