{
  "annotation_id": "e8ddccb1-44a2-4915-93b8-44c4cda0d5f3",
  "date_created": "2026-03-02T18:02:51.152000Z",
  "date_modified": "2026-03-02T18:02:51.152000Z",
  "file_hash": "68b11df21d86cf5019cf8bc4bf99e4bd2036855cd721cee7e500f9327f9fa314",
  "private": false,
  "record": {
    "abstract": "We report measurements of the Gaussian contribution, T_{2G}, to the plane\n^{63}Cu nuclear spin--spin relaxation time in the YBa_2Cu_3O_7 and YBa_2Cu_4O_8\nblocks of normal and superconducting Y_2Ba_4Cu_7O_{15}. The data confirm our\nprevious results that adjacent CuO_2 planes have different doping levels and\nthat these planes are strongly coupled. -- The static spin susceptibility at\nthe anti-ferromagnetic wave vector exhibits a Curie--Weiss like temperature\ndependence in the normal state. -- The Y_2Ba_4Cu_7O_{15} data are incompatible\nwith a phase diagram based on a single CuO_2 plane theory and suggest that the\nappearance of a spin gap implies interplane coupling. Additional data for\nYBa_2Cu_4O_8 and YBa_2Cu_3O_{6.982} are in accord with the single plane theory.\n-- The temperature dependence of T_{2G,ind} below T_c excludes isotropic s-wave\nsuperconductivity in all three compounds.",
    "arxiv_id": "supr-con/9411001",
    "authors": [
      "R. Stern",
      "M. Mali",
      "J. Roos",
      "D. Brinkmann"
    ],
    "categories": [
      "supr-con",
      "cond-mat.supr-con"
    ],
    "doi": "10.1103/PhysRevB.51.15478",
    "journal_ref": "Phys. Rev. B 51, 15478--15483 (1995)",
    "title": "Spin pseudo-gap and interplane coupling in Y_2Ba_4Cu_7O_{15}: a ^{63}Cu   nuclear spin-spin relaxation study",
    "url": "https://arxiv.org/abs/supr-con/9411001"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c2742b9b-50f9-4bfd-b7c7-55b7f9d2fc42",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}