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

M. Le Tacon; A. Sacuto; D. Colson

doi:10.1103/PhysRevB.71.100504

paper

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

arXiv:cond-mat/0501054 · doi:10.1103/PhysRevB.71.100504

Abstract

We show by non resonant effect in HgBa $_{2}$ CuO $_{4 + I^´}$ (Hg-1201)and by Zn substitutions in YBa $_{2}$ Cu $_{3}$ O $_{7 - I^´}$ (Y-123) compounds that the fully symmetric Raman spectrum has two distinct electronic contributions. The A $_{1 g}$ response consists in the superconducting pair breaking peak at the 2 $I^$ energy and a collective mode close to the magnetic resonance energy. These experimental results reconcile the \textit{d-wave} model to the A $_{1 g}$ Raman response function in so far as a collective mode that is distinct from the pair breaking peak is present in the A $_{1 g}$ channel.

4 pages, 2 figures

Two Distinct Electronic Contributions in the Fully Symmetric Raman Response of High Tc​ Cuprates

Abstract

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