C-axis electronic Raman scattering in Bi_2Sr_2CaCu_2O_{8+δ}

Details C-axis electronic Raman scattering in Bi_2Sr_2CaCu_2O_{8+δ} C-axis electronic Raman scattering in Bi_2Sr_2CaCu_2O_{8+δ}

1998-08-28

arxiv.org/abs/cond-mat/9808322v1

Physics

Condensed Matter

Superconductivity

12 pages, REVTEX, 3 postscript figures

Scientific paper

10.1103/PhysRevLett.82.3524

We report a c-axis-polarized electronic Raman scattering study of Bi_2Sr_2CaCu_2O_{8+\delta} single crystals. In the normal state, a resonant electronic continuum extends to 1.5 eV and gains significant intensity as the incoming photon energy increases. In the superconducting state, a coherence 2\Delta peak appears around 50 meV, with a suppression of the scattering intensity at frequencies below the peak position. The peak energy, which is higher than that seen with in-plane polarizations, signifies distinctly different dynamics of quasiparticle excitations created with out-of-plane polarization.

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