Mechanism of pseudogap probed by a local impurity

Abstract

The response to a local strong non-magnetic impurity in the pseudogap phase is examined in two distinctly different scenarios: phase-fluctuation (PF) of pairing field and d-density-wave (DDW) order. In the PF scenario, the resonance state is generally double-peaked near the Fermi level, and is abruptly broadened by vortex fluctuations slightly above the transition temperature. In the DDW scenario, the resonance is single-peaked and remains sharp up to gradual intrinsic thermal broadening, and the resonance energy is analytically determined to be at minus of the chemical potential.

4 pages, 2 figures

References in corpus (3)

• Interplay of magnetism and high-Tc superconductivity at individual Ni impurity atoms in Bi2Sr2CaCu2O8+d
• The Superfluid Density in the D-density-wave Scenario
• Staggered currents in the mixed state

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• Vortex structure in d-density wave scenario of pseudogap
• Two nonmagnetic impurities in the DSC and DDW state of the cuprate superconductors as a probe for the pseudogap
• Observation of electronic bound states in charge-ordered YBa${}_2$Cu${}_3$O${}_y$
• Spin-resolved impurity resonance states in electron-doped cuprate superconductors
• Linear response theory around a localized impurity in the pseudogap regime of an anisotropic superconductor: precursor pairing vs the d-density-wave scenario
• Extinction of impurity resonances in large-gap regions of inhomogeneous d-wave superconductors
• Signatures of orbital loop currents in the spatially resolved local density of states
• Pair-breaking effects in the Pseudogap Regime: Application to High Temperature Superconductors
• Impurity resonance states in electron-doped high T_c superconductors
• Electron correlation and impurity-induced quasiparticle resonance states in cuprate superconductors
• Linear response function around a localized impurity in a superconductor