Zinc-induced modification of the dynamical magnetic susceptibility in the superconducting state ofYBa2Cu3

Spin susceptibility in underdopedYBa2Cu3O6+Fong1, Bourges2, Sidis3 et al. 2000Phys. Rev. BSelf Cite224483644View full textAdd to dashboardCite

“…In this system, the size of the spin gap seems to be a good indicator of the homogeneity of the samples; impurities apparently introduce new states below the spin gap, thereby smearing out the superconductivity-induced anomalies in both temperature and energy. This has also been confirmed experimentally in Zn-substituted YBa 2 Cu 3 O 6+x [65,66].…”

Effect of Nonmagnetic Impurities on the Magnetic Resonance Peak inYBa2Cu3O7Fong1, Bourges2, Sidis3 et al. 1999Phys. Rev. Lett.Self Cite6411790View full textAdd to dashboardCite

“…It is also interesting to compare the present data to previous neutron scattering work on more heavily Zn substituted cuprate superconductors [21]- [23]. The enhanced low energy excitations near q 0 = (π, π) reported for these materials were not observed in our very lightly Zn-substituted sample (bottom panel in Fig.…”

“…1). However, at higher energies a 2% Zn-substituted, fully oxygenated YBa 2 Cu 3 O 7 sample investigated by Sidis et al [21] exhibits a spectral distribution closely similar to the one shown in Fig. 2.…”

“…Zn substitution introduces minimal structural disorder, substitutes for copper in the CuO 2 planes [18], and does not modify the hole concentration substantially [19]. The Zn ions are known to induce local magnetic moments on neighboring Cu sites [20] which are associated with low energy magnetic excitations [21,22,23]. It has further been shown that Zn impurities scatter conduction electrons near the unitary limit and rapidly suppress the superconducting transition temperature, T c [24].…”

Analysis of the Knight shift data on Li and Zn substituted YBa2Cu3O6+x

“…It has been also shown that the Zn impurities induce a Curie-like T dependence in the broadening of the 63 Cu(2) spectral line in YBa 2 Cu 3 O 6.7 [7]. The effects of nonmagnetic impurities in YBa 2 Cu 3 O 6+x have been also probed by the measurements of the 89 Y and 7 Li NMR relaxation rates T −1 1 [1,4,6] and by the inelastic neutron scattering experiments [11][12][13][14]. The T −1 1 measurements have been also carried out for Cu (2) in Zn substituted YBa 2 Cu 3 O 7 [8] and YBa 2 Cu 4 O 8 [9] systems.…”