Coexistence of the superconducting energy gap and pseudogap above and below the transition temperature of superconducting cuprates

Abstract

We express the superconducting gap, $\Delta (T)$, in terms of thermodynamic functions in both $s$- and d-wave symmetries. Applying to Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ and Y${}_{0.8}$Ca${}_{0.2}$Ba${}_2$Cu${}_3$O${}_{7-\delta }$ we find that for all dopings $\Delta (T)$ persists, as a partial gap, high above $T_c$ due to strong superconducting fluctuations. Therefore in general two gaps are present above $T_c$, the superconducting gap and the pseudogap, effectively reconciling two highly polarized views concerning pseudogap physics.

Published as Rapid Communications in Phys. Rev. B. Five pages, 4 figures

References in corpus (5)

• Visualizing pair formation on the atomic scale in the high-Tc superconductor Bi2Sr2CaCu2O8+d
• A Phenomenological Theory of The Pseudogap State
• Superconducting Fluctuations, Pseudogap and Phase Diagram in Cuprates
• Coexistence of the superconducting energy gap and pseudogap above and below the transition temperature of superconducting cuprates
• The pseudogap ground state in high temperature superconductors

Cited by in corpus (14)

• Universal self-field critical current for thin-film superconductors
• Specific temperature dependence of pseudogap in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ nanolayers
• Hartree-Fock Computation of the High-Tc Cuprate Phase Diagram
• Hydrostatic-pressure effects on the pseudogap in slightly doped YBa2Cu3O7-δ single crystals
• Peculiarities in the pseudogap behavior in optimally doped YBa2Cu3O7-δ single crystals under pressure up to 1GPa
• Coexistence of the superconducting energy gap and pseudogap above and below the transition temperature of superconducting cuprates
• Locating the pseudogap closing point in cuprate superconductors: absence of entrant or reentrant behavior
• Staggered Flux State in Two-Dimensional Hubbard Models
• Temperature dependence of upper critical fields and coherence lengths for optimally-doped $YB{a}_{2}C{u}_3{O}_{7-\delta }$ thin films
• Incoherent superconductivity well above $T_c$ in high-$T_c$ cuprates - harmonizing the spectroscopic and thermodynamic data
• Field-dependent specific heat of the canonical underdoped cuprate superconductor YBa${}_2$Cu${}_4$O${}_8$
• Fluctuating Cooper pairs in FeSe at temperatures exceeding double Tc
• Hydrostatic pressure effect on the pseudogap in Y0.77Pr0.23Ba2Cu3O7-δsingle crystals
• Evolution of the pseudogap and excess conductivity of YBa${}_2$Cu${}_3$O${}_{7-\delta }$ single crystals in the course of long-term aging