On the origin of the A$_{1g}$ and B$_{1g}$ electronic Raman scattering peaks in the superconducting state of YBa$_{2}$Cu$_{3}$O$_{7-δ}$

H. Martinho; A. A. Martin; C. Rettori; C. T. Lin; C. Bernhard

doi:10.1103/PhysRevB.69.180501

paper

On the origin of the A $_{1 g}$ and B $_{1 g}$ electronic Raman scattering peaks in the superconducting state of YBa $_{2}$ Cu $_{3}$ O $_{7 - δ}$

arXiv:cond-mat/0312032 · doi:10.1103/PhysRevB.69.180501

Abstract

The electronic Raman scattering has been investigated in optimally oxygen doped YBa $_{2}$ Cu $_{3}$ O $_{7 - δ}$ single crystals as well as in crystals with non-magnetic, Zn, and magnetic, Ni, impurities. We found that the intensity of the A $_{1 g}$ peak is impurity independent and their energy to $T_{c}$ ratio is almost constant ( $2Δ/ k_{B} T_{c} \sim 5$ ). Moreover, the signal at the B $_{1 g}$ channel is completely smeared out when non-magnetic Zn impurities are present. These results are qualitatively interpreted in terms of the Zeyher and Greco's theory that relates the electronic Raman scattering in the A $_{1 g}$ and B $_{1 g}$ channels to \textit{d}-CDW and superconducting order parameters fluctuations, respectively.

Submited to Phys. Rev. Lett

On the origin of the A1g​ and B1g​ electronic Raman scattering peaks in the superconducting state of YBa2​Cu3​O7−δ​

Abstract

On the origin of the A $_{1 g}$ and B $_{1 g}$ electronic Raman scattering peaks in the superconducting state of YBa $_{2}$ Cu $_{3}$ O $_{7 - δ}$