Low-Temperature Pseudogap Phenomenon: Precursor of High-$T_c$ Superconductivity

Abstract

In this paper, we try to understand the pseudogap phenomenon observed in the cuprate superconductor through a model study. Specifically, we explore the so-called low-temperature pseudogap state by turning off the superconducting off diagonal long range order in an ansatz state for the $t$-$J$ model [New Journal of Physics {\bf 13}, 103039 (2011)]. Besides strong non-Gaussian superconducting fluctuations, the resulting state also exhibits a systematic pseudogap behavior in both spin and charge degrees of freedom, manifested in the uniform spin susceptibility, specific heat, non-Drude resistivity, Nernst effect, as well as the quantum oscillation associated with small Fermi pockets emerging in strong magnetic fields, etc. These anomalous `normal state' properties are found in qualitative consistency with experimental measurements in the cuprates. Such a model study establishes an intrinsic connection between the peculiar pseudogap properties and the non-BCS nature of the superconducting ground state. Critical comparison with other approaches to the doped Mott insulator is also made.

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• Specific temperature dependence of pseudogap in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ nanolayers
• Composite Particle Theory of Three-dimensional Gapped Fermionic Phases: Fractional Topological Insulators and Charge-Loop Excitation Symmetry
• Pairing versus phase coherence of doped holes in distinct quantum spin backgrounds
• Two-Hole Ground State: Dichotomy in Pairing Symmetry
• Single-hole wave function in two dimensions: A case study of the doped Mott insulator
• Anomalous doping evolution of nodal dispersion revealed by in-situ ARPES on continuously doped cuprates
• Phenomenological Single-Particle Green's Function for the Pseudogap and Superconducting Phases of High-T${}_c$ Cuprates
• Crossover from Fermi Arc to Full Fermi Surface
• Thermal Hall Effect and Neutral Spinons in a Doped Mott Insulator
• Mottness, Phase String, and High-$T_c$ Superconductivity
• Electric transport in doped Mott insulators dictated by a non-Ioffe-Larkin composition rule and spinons
• Intrinsic phase fluctuation and superfluid density in doped Mott insulators
• Hydrostatic pressure effect on the pseudogap in Y0.77Pr0.23Ba2Cu3O7-δsingle crystals
• Terahertz nonlinear response in cuprate superconductors and the Higgs field in doped Mott insulators