Origin of the A1g and B1g electronic Raman scattering peaks in the superconducting state of YBa2Cu3O7−δ

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

doi:10.1103/PhysRevB.69.180501

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Origin of the A1g and B1g electronic Raman scattering peaks in the superconducting state of YBa2Cu3O7−δ

H. Martinho, A. A. Martin, C. Rettori, C. T. Lin

DOI 10.1103/PhysRevB.69.180501 · Physical Review B

T1

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Abstract

The electronic Raman scattering was investigated in optimally oxygen-doped YBa2Cu3O7−δ 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 (2Δ/kBTc∼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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	91	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	91	Pressure not reported	unknown
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	76	Pressure not reported	unknown
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	72	Pressure not reported	unknown