Two Distinct Electronic Contributions in the Fully Symmetric Raman Response of High $T_{c}$ Cuprates

Details Two Distinct Electronic Contributions in the Fully Symmetric Raman Response of High $T_{c}$ Cuprates Two Distinct Electronic Contributions in the Fully Symmetric Raman Response of High $T_{c}$ Cuprates

2005-01-04

arxiv.org/abs/cond-mat/0501054v3

Phys. Rev. B, 71, 100504(R) (2005)

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.71.100504

We show by non resonant effect in HgBa$_2$CuO$_{4+\delta}$ (Hg-1201)and by Zn substitutions in YBa$_2$Cu$_3$O$_{7-\delta}$ (Y-123) compounds that the fully symmetric Raman spectrum has two distinct electronic contributions. The A$_{1g}$ response consists in the superconducting pair breaking peak at the 2$\Delta $ energy and a collective mode close to the magnetic resonance energy. These experimental results reconcile the \textit{d-wave} model to the A$_{1g}$ Raman response function in so far as a collective mode that is distinct from the pair breaking peak is present in the A$_{1g}$ channel.

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