Single crystalline Tl 2Ba 2Ca 2Cu 3O 10 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 2∆(k̂). The A 1g- and B 2g-symmetry component show a linear frequency behavior of the scattering intensity with a peak related to the energy gap, while the B 1g-symmetry component shows a characteristic behaviour at higher frequencies. The observed frequency dependencies are consistent with a d x 2-y 2-wave symmetry of the gap and yield a ratio of 2∆ 0/k BT c = 7.4. With the polarization of the scattered and incident light either parallel or perpendicular to the CuO 2-planes a strong anisotropy due to the layered structured was detected, which indicates an almost 2 dimensional behavior of this system.
Physica C Superconductivity
- Pub Date:
- December 1994
- Condensed Matter
- 2 pages, Postscript-file including 2 figures. Accepted for publication in the Proceedings of the M^2SHTSC IV Conference, Grenoble (France), 5-9 July 1994. Proceedings to be published in Physica C. Contact address: firstname.lastname@example.org