2003/12/01 by H. Martinho, Herculano da Silva Martinho, A. A. Martin +4
Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.69.180501
Submited to Phys. Rev. Lett
arxiv created 2003/12/01 · openalex publication_date 2004/05/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The electronic Raman scattering was investigated in optimally oxygen-doped YBa2Cu3O_7\ensuremath-\ensuremathδ single crystals as well in crystals doped with nonmagnetic, Zn2+ and magnetic Ni2+ impurities. We found that the intensity of the A1g peak is impurity independent and its energy to Tc ratio is nearly constant (2\ensuremathΔ/kBTc\ensuremath∼5). Moreover, the signal at the B1g channel is completely smeared out when nonmagnetic Zn2+ impurities are present. These results are discussed in terms of the current models of Devereaux et al., Venturini et al., and Zeyher and Greco.