Possibility of d-wave superconductivity in high-Tc superconductor - NMR study in YBa2(Cu1−xMx)3O7 (M=Zu,Ni) -

Ishida, K.; Kitaoka, Y.; Ogata, Nobuhito; Kamino, T.

doi:10.1016/0921-4534(91)91781-x

Cited by 9 publications

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“…40 It is now well established that Zn and Ni in YBa 2 Cu 3 O 6.95 ͑YBCO͒ can have very different effects on superconducting properties. [41][42][43][44] As an example, Ni in small concentrations does not change the power law observed for the low temperature dependence of the penetration depth, while additions of Zn changes it from T to a T 2 law. This is what is expected for resonant scattering in the unitary limit.…”

Section: Introductionmentioning

confidence: 94%

Imaginary part of the infrared conductivity of adx2−y2

et al. 1996

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We give results for the effect of Born and of resonant impurity scattering on the imaginary part of the infrared conductivity (⍀) of a d x 2 Ϫy 2 superconductor. Inelastic scattering is included in our work through an electron-boson spectral density which also causes the pairing. We emphasize the product of ⍀ times the imaginary past of (⍀). Its zero frequency limit gives the penetration depth, while around twice the gap value it shows smooth behavior as is observed in YBa 2 Cu 3 O 6.95 , which has d x 2 Ϫy 2 symmetry. This is in sharp contrast to the case of an s-wave superconductor which would display a sharp characteristic dip at this energy as seen in BaKBiO. ͓S0163-1829͑96͒10026-6͔

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Section: Introductionmentioning

confidence: 94%

Imaginary part of the infrared conductivity of adx2−y2

et al. 1996

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“…Since they are not in the same symmetry representation, non magnetic impurities act as pair breakers in unconventional superconductors with higher orbital momentum such as d-wave superconductors. As a result, the measured low temperature properties of YBaCu 2 0 7 4 displays a remarkable sensitivity to the presence of non magnetic impurities: the critical temperature, for example, is suppressed even for very small density of impurities 5 . Furthermore the d-wave superconductor is special, due to the presence of gap nodes which prevents the complete freezing of scattering processes at low energy.…”

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confidence: 99%

Density of states of ad-wave superconductor in the presence of strong impurity scatterers: A nonperturbative result

Pépin

Lee

2001

Phys. Rev. B

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We present a method to compute the density of states induced by a finite density of non magnetic impurities in a d-wave superconductor, in the unitary limit of very strong scattering centers. For frequencies very small as compared to the superconducting gap (ω ≪ ∆ 0 ) the additional density of states has the leading divergence δρ(ω) ≃ n i / |2ω| ln 2 |ω/∆ 0 | . This result is non perturbative.78.20. Ls, 47.25.Gz, 76.50+b, 72.15.Gd Typeset using REVT E X 1

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Distorted local environment around Zn on Cu(2) sites inYBa2Cu3<

Bridges

Boyce

et al. 1993

Phys. Rev. B

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Possibility of d-wave superconductivity in high-Tc superconductor - NMR study in YBa2(Cu1−xMx)3O7 (M=Zu,Ni) -

Cited by 9 publications

References 0 publications

Imaginary part of the infrared conductivity of adx2−y2

Imaginary part of the infrared conductivity of adx2−y2

Density of states of ad-wave superconductor in the presence of strong impurity scatterers: A nonperturbative result

Distorted local environment around Zn on Cu(2) sites inYBa2Cu3<

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