Effects of Strong Correlations and Disorder in d-Wave Superconductors

Abstract

We use exact diagonalization techniques to study the interplay between strong correlations, superconductivity, and disorder in a model system. We study an extension of the t-J model by adding an infinite-range d-wave superconductivity inducing term and disorder. Our work shows that in the clean case the magnitude of the order parameter is surprisingly small for low-hole filling, thus implying that mean-field theories might be least accurate in that important regime. We demonstrate that substantial disorder is required to destroy a d-wave superconducting state for low-hole doping. We provide the first bias free numerical results for the local density of states of a strongly correlated d-wave superconducting model, relevant for STM measurements at various fillings and disorders.

4 pages, 4 figures, as published

References in corpus (4)

• Scanning tunneling spectroscopy of high-temperature superconductors
• Electronic Origin of the Inhomogeneous Pairing Interaction in the High-Tc Superconductor Bi2Sr2CaCu2O8+d
• A distinct bosonic mode in an electron-doped high-transition-temperature superconductor
• Breakdown of universal transport in correlated d-wave superconductors

Cited by in corpus (5)

• Fidelity and superconductivity in two-dimensional t-J models
• Fidelity Study of Superconductivity in Extended Hubbard Models
• Site-wise manipulations and Mott insulator-superfluid transition of interacting photons using superconducting circuit simulators
• Disorder-dependent superconducting pairing symmetry in doped graphene
• Order by projection in single-band Hubbard model: a DMRG study