Zn doping effect on the superconducting gap in YBa2Cu3O7−δ: Raman study

M. Limonov; D. Shantsev; S. Tajima; A. Yamanaka

doi:10.1103/PhysRevB.65.024515

← Back to search

Zn doping effect on the superconducting gap in YBa2Cu3O7−δ: Raman study

M. Limonov, D. Shantsev, S. Tajima, A. Yamanaka

DOI 10.1103/PhysRevB.65.024515 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

The Raman scattering spectra of twin-free YBa2(Cu1−xZnx)3O7−δ single crystals with an optimal oxygen content (Tc=93K at x=0) have been investigated in a temperature range from 300 to 10 K in YY and X′Y′ polarizations. Below Tc, we found a low-frequency shift of the gap-related peak in the electronic response with Zn doping, accompanied by broadening. The changes in the phonon renormalization effects are consistent with the change in the electronic response. All the observed Zn-doping effects can be roughly described in the theoretical model for a d-wave superconductor in a unitarity limit.

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.	93	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	93	Pressure not reported	unknown
YBa2(Cu1-xZnx)3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	85	Pressure not reported	unknown