Low Energy Electronic Raman Scattering in Cuprate High Temperature Superconductors
Kang, Moonsoo
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https://hdl.handle.net/2142/80641
Description
Title
Low Energy Electronic Raman Scattering in Cuprate High Temperature Superconductors
Author(s)
Kang, Moonsoo
Issue Date
1997
Doctoral Committee Chair(s)
Klein, M.V.
Department of Study
Physics
Discipline
Physics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Condensed Matter
Language
eng
Abstract
The temperature dependence of the 2$\Delta$-peak in overdoped Tl-2201 implies that the superconducting gap opens very rapidly below the critical temperature. The measured peak intensity as a function of temperature, however, shows an anomalous behavior. A magnetic field is observed to affect Raman spectra in way similar to the way temperature does. Nevertheless, the peak intensity change as a function of magnetic field is different from that of temperature. The upper critical fields were extracted by analyzing the field dependence of the 2$\Delta$-peak intensity. The upper critical fields obtained from Raman scattering in magnetic field show that superconducting order is present above the irreversibility field obtained from magnetization measurements.
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