The nodal gap component as a good candidate for the superconducting order parameter in cuprates

Abstract

Although more than twenty years have passed since the discovery of high temperature cuprate superconductivity, the identification of the superconducting order parameter is still under debate. Here, we show that the nodal gap component is the best candidate for the superconducting order parameter. It scales with the critical temperature $T_c$ over a wide doping range and displays a significant temperature dependence below $T_c$ in both the underdoped and the overdoped regimes of the phase diagram. In contrast, the antinodal gap component does not scale with $T_c$ in the underdoped side and appears to be controlled by the pseudogap amplitude. Our experiments establish the existence of two distinct gaps in the underdoped cuprates.

References in corpus (17)

• Inelastic Light Scattering From Correlated Electrons
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• Visualizing pair formation on the atomic scale in the high-Tc superconductor Bi2Sr2CaCu2O8+d
• Two Gaps Make a High Temperature Superconductor?
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• Distinct doping dependences of the pseudogap and superconducting gap La${}_{2-x}$Sr${}_x$CuO${}_4$ cuprate superconductors
• Evolution of the gaps through the cuprate phase-diagram
• Interplay between the pseudogap and superconductivity in HgBa${}_2$CuO${}_4$ single crystals
• Doping Dependence of Two Energy Scales in the Tunneling Spectra of Superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$
• Coupling between quasiparticles and a bosonic mode in the normal state of HgBa${}_2$CuO${}_{4+\delta }$

Cited by in corpus (30)

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• A Theory for the High-T_c Cuprates: Anomalous Normal-State and Spectroscopic Properties, Phase Diagram, and Pairing
• The doping-driven evolution of the superconducting state of a doped Mott insulator: a key for the high temperature superconductivity
• The effect of the pseudogap on suppressing high energy inelastic neutron scattering in superconducting YBa2Cu3O6.5
• Spin Dynamics in Cuprates: Optical Conductivity of HgBa2CuO4
• Signatures of Fermi surface reconstruction in Raman spectra of underdoped cuprates
• A Two Energy Gap Preformed-Pair Scenario For the Cuprates: Implications for Angle-Resolved Photoemission Spectroscopy
• Quantitative Raman measurements of the evolution of the Cooper-pairs density with doping in Bi2Sr2CaCu2O8+d superconductors
• Dielectric versus magnetic pairing mechanisms in high-temperature cuprate superconductors investigated using Raman scattering
• Evolution of the dynamical pairing across the phase diagram of a strongly correlated high-temperature superconductor
• Strongly-overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$: Evidence for Josephson-coupled grains of strongly-correlated superconductor
• Low-energy antiferromagnetic spin fluctuations limit the coherent superconducting gap in cuprates
• Electronic Raman Scattering in copper oxide Superconductors: Understanding the Phase Diagram
• Theory of the Fermi Arcs, the Pseudogap, $T_c$ and the Anisotropy in k-space of Cuprate Superconductors
• The pseudogap in YBa${}_2$Cu${}_3$O${}_{6+\delta }$ is not bounded by a line of phase transitions - thermodynamic evidence
• Three energy scales in the superconducting state of hole-doped cuprates detected by electronic Raman scattering
• Phase Competition and Anomalous Thermal Evolution in High-Temperature Superconductors
• Coherency of the superconducting state: the muon spin rotation and ARPES studies of (BiPb)_2(SrLa)_2CuO_{6+δ}
• Universal relationship between the energy scales of the pseudogap phase, the superconducting state and the charge density wave order in copper oxide superconductors
• Incoherent superconductivity well above $T_c$ in high-$T_c$ cuprates - harmonizing the spectroscopic and thermodynamic data
• Doping and temperature dependence of electronic Raman response in cuprate superconductors
• Exploration of the Hg-based cuprate superconductors by Raman spectroscopy under hydrostatic pressure
• Electron-phonon pairing mechanism: cuprates with high value of the critical temperature
• Electronic Raman response in electron-doped cuprate superconductors
• Pseudogap-induced anisotropic suppression of electronic Raman response in cuprate superconductors
• Pseudogap in cuprate and organic superconductors
• A Unified Theory for the Cuprates, Iron-Based and Similar Superconducting Systems: Application for Spin and Charge Excitations in the Hole-Doped Cuprates
• Remarks on the Order Parameter of the Cuprate High Temperature Superconductors
• Electronic structure in underdoped cuprates due to the emergence of a pseudogap