Spin pseudo-gap and interplane coupling in Y_2Ba_4Cu_7O_{15}: a ^{63}Cu nuclear spin-spin relaxation study

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dc.creatorStern, R.
dc.creatorMali, M.
dc.creatorRoos, J.
dc.creatorBrinkmann, D.
dc.date1994-11-02
dc.date.accessioned2026-07-07T09:18:03Z
dc.date.available2026-07-07T09:18:03Z
dc.descriptionWe report measurements of the Gaussian contribution, T_{2G}, to the plane ^{63}Cu nuclear spin--spin relaxation time in the YBa_2Cu_3O_7 and YBa_2Cu_4O_8 blocks of normal and superconducting Y_2Ba_4Cu_7O_{15}. The data confirm our previous results that adjacent CuO_2 planes have different doping levels and that these planes are strongly coupled. -- The static spin susceptibility at the anti-ferromagnetic wave vector exhibits a Curie--Weiss like temperature dependence in the normal state. -- The Y_2Ba_4Cu_7O_{15} data are incompatible with a phase diagram based on a single CuO_2 plane theory and suggest that the appearance of a spin gap implies interplane coupling. Additional data for YBa_2Cu_4O_8 and YBa_2Cu_3O_{6.982} are in accord with the single plane theory. -- The temperature dependence of T_{2G,ind} below T_c excludes isotropic s-wave superconductivity in all three compounds.
dc.description7 pages, REVTEX 3.0, 5 figures available upon request
dc.identifierhttps://arxiv.org/abs/supr-con/9411001
dc.identifierhttp://arxiv.org/abs/supr-con/9411001
dc.identifierPhys. Rev. B 51, 15478--15483 (1995)
dc.identifierdoi:10.1103/PhysRevB.51.15478
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/153889
dc.subjectSuperconductivity
dc.titleSpin pseudo-gap and interplane coupling in Y_2Ba_4Cu_7O_{15}: a ^{63}Cu nuclear spin-spin relaxation study
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