Electronic Raman scattering of overdoped Tl2Ba2CuO6+δ in high magnetic fields

G. Blumberg, Moonsoo Kang, M. V. Klein

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Abstract

The excitations across the superconducting gap (2Δ-peak in B1g-symmetry Raman spectra) in an overdoped Tl2Ba2CuO6+δ single crystal have been studied as a function of temperature and field. The 2Δ-peak intensity, which we interpret as the density of the superconducting condensate around the gap antinodes, is a linear function of temperature, but a nonlinear function of field. The latter is attributed to renormalization of quasi-particle spectra in the vicinity of vortex lines in the mixed state. The 2Δ-peak is present above the irreversibility line and yields a conventional temperature dependence of the effective upper critical field.

Original languageEnglish (US)
Pages (from-to)1009-1010
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume282-287
Issue numberPART 2
DOIs
StatePublished - Aug 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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