Cuprate interband model and doping dependence of the coherence length
| dc.creator | Kristoffel, N. | |
| dc.creator | Ord, T. | |
| dc.creator | Rubin, P. | |
| dc.date | 2005-04-18 | |
| dc.date | 2005-06-14 | |
| dc.date.accessioned | 2026-07-07T03:04:46Z | |
| dc.date.available | 2026-07-07T03:04:46Z | |
| dc.description | The free energy expansion of a two-band pair-transfer superconductor is developed. A critical in temperature and a noncritical coherence length appear. The effective in-plane $ξ_{ab}$, $H_{c2}\sp c\sim ξ_{ab}\sp{-2}$ and the thermodynamic critical magnetic field ($H_{c0}$) on the whole hole doping ($p$) scale are calculated for a "typical'' cuprate. A doping-prepared bare spectrum with normal state gaps quenched by doping has been used. The coherence length $ξ_{ab}$ falls with $p$ first rapidly. A moderate enhancement starts when the "cold'' defect band overlap with the valence band is reached. At overdoping $ξ_{ab}$ rises markedly. The $H_{c2}\sp c$ curve shows a maximum before $T_{cmax}$. The bell-like $H_{c0}$-curve follows closely $T_c$, superconducting gaps, and superfluid density. The theoretical $ξ_{ab}(p)$ nonmonotonic curve on the whole doping scale agrees with a recent experimental finding. | |
| dc.description | 15 pages, 3 Postscript figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0504431 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0504431 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/26214 | |
| dc.subject | Superconductivity | |
| dc.title | Cuprate interband model and doping dependence of the coherence length | |
| dc.type | text |