Point nodes persisting far beyond Tc in Bi2212

Abstract

In contrast to a complex feature of antinodal state, suffering from competing order(s), the "pure" pairing gap of cuprates is obtained in the nodal region, which therefore holds the key to the superconducting mechanism. One of the biggest question is whether the point nodal state as a hallmark of d-wave pairing collapses at Tc like the BCS-type superconductors, or it instead survives above Tc turning into the preformed pair state. A difficulty in this issue comes from the small magnitude of the nodal gap, which has been preventing experimentalists from solving it. Here we use a laser ARPES capable of ultrahigh energy resolution, and detect the point nodes surviving far beyond Tc in Bi2212. By tracking the temperature evolution of spectra, we reveal that the superconductivity occurs when the pair breaking rate is suppressed smaller than the single particle scattering rate on cooling, which governs the value of Tc in cuprates.

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• Phase Diagram of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ Revisited
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• Collapse of superconductivity in cuprates via ultrafast quenching of phase coherence
• When Superconductivity Crosses Over: From BCS to BEC
• Observation of small Fermi pockets protected by clean CuO2 sheets of a high-Tc superconductor
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• Locating the pseudogap closing point in cuprate superconductors: absence of entrant or reentrant behavior
• Unveiling phase diagram of the lightly doped high-Tc cuprate superconductors with disorder removed
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• Disappearance of Superconductivity Due to Vanishing Coupling in the Overdoped Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Electromagnetic properties of impure superconductors with pair-breaking processes
• Quasi-particles ultrafastly releasing kink bosons to form Fermi arcs in a cuprate superconductor
• Signatures of enhanced superconducting phase coherence through MID-IR excitation in optimally doped Y-Bi2212
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• Time-resolved ARPES on cuprates: Tracking the low-energy electrodynamics in the time domain
• Revisiting the vortex-core tunnelling spectroscopy in YBa${}_2$Cu${}_3$O${}_{7-\delta }$
• Fluctuating Nature of Light-Enhanced $d$-Wave Superconductivity: A Time-Dependent Variational Non-Gaussian Exact Diagonalization Study
• The cuprate phase diagram and the influence of nanoscale inhomogeneities
• Particle-hole asymmetric superconducting coherence peaks in overdoped cuprates
• Witnessing Light-Driven Entanglement using Time-Resolved Resonant Inelastic X-Ray Scattering
• Absence of a BCS-BEC crossover in the cuprate superconductors
• Spectroscopic Evidence of Low Energy Gaps Persisting Towards 120 Kelvin in Surface-Doped p-Terphenyl Crystals
• Phase fluctuations in two-dimensional superconductors and pseudogap phenomenon
• Laser-based angle-resolved photoemission spectroscopy with micrometer spatial resolution and detection of three-dimensional spin vector
• Clocking the Onset of Bilayer Coherence in a High-${\mathrm{T}}_{\mathrm{C}}$ Cuprate
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• Higher-Order Spin-Hole Correlations around a Localized Charge Impurity
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• Ubiquitous Coexisting Electron-Mode Couplings in High Temperature Cuprate Superconductors
• Investigation of Precursor Superconducting State in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ through In-plane Optical Spectroscopy
• Non-Fermi liquid scattering against an emergent Bose liquid: manifestations in the kink and other exotic quasiparticle behaviors in the normal-state cuprate superconductors
• Incoherent superconductivity well above $T_c$ in high-$T_c$ cuprates - harmonizing the spectroscopic and thermodynamic data
• A theory of coupled dual dynamics of macroscopic phase coherence and microscopic electronic fluids: effect of dephasing on cuprate superconductivity
• Field-dependent specific heat of the canonical underdoped cuprate superconductor YBa${}_2$Cu${}_4$O${}_8$
• Temperature and field dependence of the intrinsic tunnelling structure in overdoped Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Entanglement Witness for Indistinguishable Electrons using Solid-State Spectroscopy
• Colossal transverse magnetoresistance due to nematic superconducting phase fluctuations in a copper oxide
• Photoinduced filling of near nodal gap in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Revised phase diagram of the high-$T_c$ cuprate superconductor Pb-doped Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ revealed by anisotropic transport measurements
• Phase transitions to dipolar clusters and charge density waves in high Tc superconductors
• The High Temperature Superconductivity in Cuprates: Physics of the Pseudogap Region
• Anisotropic Time-Domain Electronic Response in Cuprates
• Resonant Inelastic X-Ray Scattering Spectra of Cuprate Superconductors Predicted by Model of Fractionalized Fermions
• Theory of symmetry-resolved quench-drive spectroscopy: Nonlinear response of phase-fluctuating superconductors
• Coupled electronic and magnetic excitations in the cuprates and their role in the superconducting transition
• Supercurrent-induced Anomalous Thermal Hall Effect as a New Probe to Superconducting Gap Anisotropy
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• Ultrafast Raman probe of the photoinduced superconducting to normal state transition in the cuprate Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$