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arXiv · cond-mat/0311579

Resonant Raman scattering in mercurate single crystals

Y. Gallais·A. Sacuto·D. Colson
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Abstract

We report resonant electronic Raman scattering in optimally doped single layer HgBa$_2$CuO$_{4+δ}$ (Hg-1201) and trilayer HgBa$_2$Ca$_2$Cu$_3$O$_{8+δ}$ (Hg-1223) single crystals. Analysis of the $B_{1g}$ and B$_{2g}$ channels in the superconducting state of Hg-1201 advocates for a gap having d-wave symmetry. In addition a resonant study $B_{1g}$ pair-breaking peak and the $A_{1g}$ peak suggests that the $A_{1g}$ 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.

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Y. Gallais, A. Sacuto, D. Colson. 2003-11-25. Resonant Raman scattering in mercurate single crystals. https://doi.org/10.1016/j.physc.2004.03.131

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