Energetics of superconductivity in the two dimensional Hubbard model

Abstract

The energetics of the interplay between superconductivity and the pseudogap in high temperature superconductivity is examined using the eight-site dynamical cluster approximation to the two dimensional Hubbard model. Two regimes of superconductivity are found: a weak coupling/large doping regime in which the onset of superconductivity causes a reduction in potential energy and an increase in kinetic energy, and a strong coupling regime in which superconductivity is associated with an increase in potential energy and decrease in kinetic energy. The crossover between the two regimes is found to coincide with the boundary of the normal state pseudogap, providing further evidence of the unconventional nature of superconductivity in the pseudogap regime. However the absence, in the strongly correlated but non-superconducting state, of discernibly nonlinear response to an applied pairing field, suggests that resonating valence bond physics is not the origin of the kinetic-energy driven superconductivity.

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Cited by in corpus (30)

• Fate of the false Mott-Hubbard transition in two dimensions
• Fluctuation diagnostics of the electron self-energy: Origin of the pseudogap physics
• Competition among various charge-inhomogeneous states and d-wave superconducting state in Hubbard models on square lattices
• Intermediate Coupling Model of the Cuprates
• Hidden Mott transition and large-$U$ superconductivity in the two-dimensional Hubbard model
• Pairing Glue in the Two Dimensional Hubbard Model
• Temperature Dependence of Spin and Charge Orders in the Doped Two-Dimensional Hubbard Model
• Photo-enhanced antinodal conductivity in the pseudogap state of high Tc cuprates
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• Mott Criticality as the Confinement Transition of a Pseudogap-Mott Metal
• Interplay between condensation energy, pseudogap and the specific heat of a Hubbard model in a n-pole approximation
• Superconductivity and inhomogeneous charge-ordered state in the two-Dimensional Hubbard model -- Off-Diagonal Wave Function Monte Carlo Studies of Hubbard Model IV