Resonant Raman scattering in mercurate single crystals

Y. Gallais; A. Sacuto; D. Colson

doi:10.1016/j.physc.2004.03.131

paper

Resonant Raman scattering in mercurate single crystals

arXiv:cond-mat/0311579 · doi:10.1016/j.physc.2004.03.131

Abstract

We report resonant electronic Raman scattering in optimally doped single layer HgBa $_{2}$ CuO $_{4 + I^´}$ (Hg-1201) and trilayer HgBa $_{2}$ Ca $_{2}$ Cu $_{3}$ O $_{8 + I^´}$ (Hg-1223) single crystals. Analysis of the $B_{1 g}$ and B $_{2 g}$ channels in the superconducting state of Hg-1201 advocates for a gap having d-wave symmetry. In addition a resonant study $B_{1 g}$ pair-breaking peak and the $A_{1 g}$ peak suggests that the $A_{1 g}$ peak is not directly related to the d-wave superconducting gap amplitude. Comparison with trilayer Hg-1223 demonstrates the universal behavior of this two energy scales in optimally doped cuprates.

4 pages, 4 figures, M2S-Rio (invited paper). to appear in Physica C