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 $\Gamma$.

References in corpus (16)

• Scanning tunneling spectroscopy of high-temperature superconductors
• A `checkerboard' electronic crystal state in lightly hole-doped Ca_{2-x}Na_{x}CuO_{2}Cl_{2}
• Two Gaps Make a High Temperature Superconductor?
• Distinct Fermi-Momentum Dependent Energy Gaps in Deeply Underdoped Bi2212
• Charge density wave origin of cuprate checkerboard visualized by scanning tunneling microscopy
• From a single-band metal to a high-temperature superconductor via two thermal phase transitions (Supporting Material)
• From a single-band metal to a high-temperature superconductor via two thermal phase transitions
• Vortex Imaging in the pi-Band of Magnesium Diboride
• Electronic Origin of the Inhomogeneous Pairing Interaction in the High-Tc Superconductor Bi2Sr2CaCu2O8+d
• Momentum dependence of the superconducting gap in Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Laser ARPES, the sudden approximation, and quasiparticle-like peaks in Bi2Sr2CaCu2O8+delta
• Evolution of the electronic excitation spectrum with strongly diminishing hole-density in superconducting Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}
• Protected nodes and the collapse of the Fermi arcs in high Tc cuprates
• The Origin and Non-quasiparticle Nature of Fermi Arcs in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Nodal Quasiparticle Lifetimes in Cuprate Superconductors
• Correction of non-linearity effects in detectors for electron spectroscopy

Cited by in corpus (17)

• Theory of Intertwined Orders in High Temperature Superconductors
• Energy gaps in high-transition temperature cuprate superconductors
• Point nodes persisting far beyond Tc in Bi2212
• Electron pairing in the pseudogap state revealed by shot noise in copper-oxide junctions
• 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
• 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
• 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
• Particle-hole Asymmetry in the Cuprate Pseudogap Measured with Time-Resolved Spectroscopy
• 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
• Theory of symmetry-resolved quench-drive spectroscopy: Nonlinear response of phase-fluctuating superconductors
• Tunneling spectroscopy of c-axis epitaxial cuprate junctions