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

H. L. Liu·G. Blumberg·M. V. Klein·P. Guptasarma·D. G. Hinks
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Abstract

We report a c-axis-polarized electronic Raman scattering study of Bi_2Sr_2CaCu_2O_{8+δ} 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 2Δpeak 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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H. L. Liu, G. Blumberg, M. V. Klein, P. Guptasarma, D. G. Hinks. 1998-08-28. C-axis electronic Raman scattering in Bi_2Sr_2CaCu_2O_{8+δ}. https://doi.org/10.1103/physrevlett.82.3524

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