Electronic Raman scattering of Tl-2223 and the symmetry of the superconducting gap

A. Hoffmann, P. Lemmens, G. Güntherodt, V. Thomas, K. Winzer

Research output: Contribution to journalArticlepeer-review

Abstract

Single crystalline Tl2Ba2Ca2Cu3O10 was studied using electronic Raman scattering. The renormalization of the scattering continuum was investigated as a function of the scattering geometry to determine the superconducting energy gap 2Δ(k̂). The A1g- and B2g-symmetry component show a linear frequency behavior of the scattering intensity with a peak related to the energy gap, while the B1g-symmetry component shows a characteristic behaviour at higher frequencies. The observed frequency dependencies are consistent with a dx2-y2 -wave symmetry of the gap and yield a ratio of 2Δ0/kBTc = 7.4. With the polarization of the scattered and incident light either parallel or perpendicular to the CuO2-planes a strong anisotropy due to the layered structured was detected, which indicates an almost 2 dimensional behavior of this system.

Original languageEnglish (US)
Pages (from-to)1897-1898
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume235-240
Issue numberPART 3
DOIs
StatePublished - Dec 1994
Externally publishedYes

ASJC Scopus subject areas

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

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