On the Bilayer Coupling in the Yttrium-Barium Family of High Temperature Superconductors
| dc.creator | Millis, A. J. | |
| dc.creator | Monien, H. | |
| dc.date | 1995-06-20 | |
| dc.date.accessioned | 2026-07-07T03:07:46Z | |
| dc.date.available | 2026-07-07T03:07:46Z | |
| dc.description | We present and solve a model for the susceptibility of two CuO2 planes coupled by an interplane coupling J_perp and use the results to analyze a recent "cross-relaxation" NMR experiment on Y2Ba4Cu7O15. We deduce that in this material the product of J_perp and the maximum value of the in-plane susceptibility chi_max varies from approximately 0.2 at T = 200 K to 0.4 at T = 120 K and that this implies the existence of a temperature dependent in-plane spin correlation length. Using estimates of chi_max from the literature we find 5 meV < J_perp < 20 meV. We discuss the relation of the NMR results to neutron scattering results which have been claimed to imply that in YBa2Cu3O_{6+x} the two planes of a bilayer are perfectly anticorrelated. We also propose that the recently observed 41 meV excitation in YBa2Cu3O7 is an exciton pulled down below the superconducting gap by J_perp. | |
| dc.description | 11 pages, 3 postscript figures (uuencoded and compressed) | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9506088 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9506088 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/27295 | |
| dc.subject | Condensed Matter | |
| dc.title | On the Bilayer Coupling in the Yttrium-Barium Family of High Temperature Superconductors | |
| dc.type | text |