Linear response theory around a localized impurity in the pseudogap regime of an anisotropic superconductor: precursor pairing vs the d-density-wave scenario

Simple item page
dc.creatorAndrenacci, N.
dc.creatorAngilella, G. G. N.
dc.creatorBeck, H.
dc.creatorPucci, R.
dc.date2004-05-12
dc.date.accessioned2026-07-07T02:58:07Z
dc.date.available2026-07-07T02:58:07Z
dc.descriptionWe derive the polarizability of an electron system in (i) the superconducting phase, with d-wave symmetry, (ii) the pseudogap regime, within the precursor pairing scenario, and (iii) the d-density-wave (dDW) state, characterized by a d-wave hidden order parameter, but no pairing. Such a calculation is motivated by the recent proposals that imaging the effects of an isolated impurity may distinguish between precursor pairing and dDW order in the pseudogap regime of the high-Tc superconductors. In all three cases, the wave-vector dependence of the polarizability is characterized by an azymuthal modulation, consistent with the d-wave symmetry of the underlying state. However, only the dDW result shows the fingerprints of nesting, with nesting wave-vector Q=(pi,pi), albeit imperfect, due to a nonzero value of the hopping ratio t'/t in the band dispersion relation. As a consequence of nesting, the presence of hole pockets is also exhibited by the (q,omega) dependence of the retarded polarizability.
dc.descriptionaccepted in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/0405239
dc.identifierhttp://arxiv.org/abs/cond-mat/0405239
dc.identifierPhys. Rev. B 70 (2004) 024507
dc.identifierdoi:10.1103/PhysRevB.70.024507
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23944
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleLinear response theory around a localized impurity in the pseudogap regime of an anisotropic superconductor: precursor pairing vs the d-density-wave scenario
dc.typetext

Files

Collections

arXiv