Pairing Fluctuation Theory of Superconducting Properties in Underdoped to Overdoped Cuprates

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dc.creatorChen, Qijin
dc.creatorKosztin, Ioan
dc.creatorJanko, Boldizsar
dc.creatorLevin, K.
dc.date1998-07-31
dc.date.accessioned2026-07-07T03:11:12Z
dc.date.available2026-07-07T03:11:12Z
dc.descriptionWe propose a theoretical description of the superconducting state of under- to overdoped cuprates, based on the short coherence length of these materials and the associated strong pairing fluctuations. The calculated $T_c$ and the zero temperature excitation gap $Δ(0)$, as a function of hole concentration $x$, are in semi-quantitative agreement with experiment. Although the ratio $T_c/Δ(0)$ has a strong $x$ dependence, different from the universal BCS value, and $Δ(T)$ deviates significantly from the BCS prediction, we obtain, quite remarkably, quasi-universal behavior, for the normalized superfluid density $ρ_s(T)/ρ_s(0)$ and the Josephson critical current $I_c(T)/I_c(0)$, as a function of $T/T_c$. While experiments on $ρ_s(T)$ are consistent with these results, future measurements on $I_c(T)$ are needed to test this prediction.
dc.description4 pages, 3 figures, REVTeX, submitted to Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/cond-mat/9807414
dc.identifierhttp://arxiv.org/abs/cond-mat/9807414
dc.identifierPhys. Rev. Lett. 81, 4708 (1998)
dc.identifierdoi:10.1103/PhysRevLett.81.4708
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/28482
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titlePairing Fluctuation Theory of Superconducting Properties in Underdoped to Overdoped Cuprates
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