Pre-pairing and the "Filling" Gap in the Cuprates From the Tomographic Density of States

Abstract

We use the tomographic density of states (TDoS), which is a measure of the density of states for a single slice through the band structure of a solid, to study the temperature evolution of the superconducting gap in the cuprates. The TDoS provides unprecedented accuracy in determining both the superconducting pair-forming strength, $\Delta$, and the pair-breaking rate, $\Gamma$. In both optimally- and under-doped Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$, we find the near-nodal $\Delta$ smoothly evolves through the superconducting transition temperature - clear evidence for the existence of pre-formed pairs. Additionally, we find the long observed `filling' of the superconducting gap in the cuprates is due to the strongly temperature dependent $\Gamma$.

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Cited by in corpus (28)

• Theory of Intertwined Orders in High Temperature Superconductors
• Energy gaps in high-transition temperature cuprate superconductors
• Pseudogap temperature $T^{\star }$ of cuprate superconductors from the Nernst effect
• Point nodes persisting far beyond Tc in Bi2212
• Electron pairing in the pseudogap state revealed by shot noise in copper-oxide junctions
• Emergence of superconductivity in the cuprates via a universal percolation process
• Time-resolved photoemission apparatus achieving sub-20-meV energy resolution and high stability
• Direct evidence for Cooper pairing without a spectral gap in a disordered superconductor above $T_C$
• Superconducting fluctuations probed by the Higgs mode in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$ thin films
• Percolative nature of the dc paraconductivity in the cuprate superconductors
• The special role of the first Matsubara frequency for superconductivity near a quantum-critical point -- the non-linear gap equation below $T_c$ and spectral properties in real frequencies
• The interplay between superconductivity and non-Fermi liquid at a quantum-critical point in a metal
• Fano interference of the Higgs mode in cuprate high-Tc superconductors
• 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
• Monte Carlo study of the pseudogap and superconductivity emerging from quantum magnetic fluctuations
• Effects, Determination, and Correction of Count Rate Nonlinearity in Multi-Channel Analog Electron Detectors
• Superconductivity above a quantum critical point in a metal -- gap closing vs gap filling, Fermi arcs, and pseudogap behavior
• Experimental evidence of anomalously large superconducting gap on topological surface state of $\beta$-$\mathbf{B}{\mathbf{i}}_2\mathbf{Pd}$ film
• Particle-hole Asymmetry in the Cuprate Pseudogap Measured with Time-Resolved Spectroscopy
• Self-Energies and Quasiparticle Scattering Interference
• Large momentum-dependence of the main dispersion "kink" in the high-Tc superconductor Bi2Sr2CaCu2O8+δ
• Interplay of superconductivity and bosonic coupling in the peak-dip-hump structure of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• 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
• What is the Pairing Glue in the Cuprates? Insights from Normal and Anomalous Propagators
• Tunneling spectroscopy of c-axis epitaxial cuprate junctions
• Theory of symmetry-resolved quench-drive spectroscopy: Nonlinear response of phase-fluctuating superconductors