2005/04/18 by N. Kristoffel, Kristoffel, N., T. Örd +4
Engineering · Physics and Astronomy · #Acoustic Wave Resonator Technologies #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0504431
15 pages, 3 Postscript figures
openalex publication_date 2005/04/18 · arxiv created 2005/06/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 ξab, Hc2\sp c∼ ξab\sp-2 and the thermodynamic critical magnetic field (Hc0) 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 ξab falls with p first rapidly. A moderate enhancement starts when the "cold'' defect band overlap with the valence band is reached. At overdoping ξab rises markedly. The Hc2\sp c curve shows a maximum before Tcmax. The bell-like Hc0-curve follows closely Tc, superconducting gaps, and superfluid density. The theoretical ξab(p) nonmonotonic curve on the whole doping scale agrees with a recent experimental finding.