Local density of states and Friedel oscillations around a non-magnetic impurity in unconventional density wave

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dc.creatorVanyolos, Andras
dc.creatorDora, Balazs
dc.creatorVirosztek, Attila
dc.date2007-01-29
dc.date.accessioned2026-07-07T08:00:30Z
dc.date.available2026-07-07T08:00:30Z
dc.descriptionWe present a mean-field theoretical study on the effect of a single non-magnetic impurity in quasi-one dimensional unconventional density wave. The local scattering potential is treated within the self-consistent $T$-matrix approximation. The local density of states around the impurity shows the presence of resonant states in the vicinity of the Fermi level, much the same way as in $d$-density waves or unconventional superconductors. The assumption for different forward and backscattering, characteristic to quasi-one dimensional systems in general, leads to a resonance state that is double peaked in the pseudogap. The Friedel oscillations around the impurity are also explored in great detail, both within and beyond the density wave coherence length $ξ_0$. Beyond $ξ_0$ we find power law behavior as opposed to the exponential decay of conventional density wave. The entropy and specific heat contribution of the impurity are also calculated for arbitrary scattering strengths.
dc.description13 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0701732
dc.identifierhttp://arxiv.org/abs/cond-mat/0701732
dc.identifierPhys. Rev. B 75, 193101 (2007)
dc.identifierdoi:10.1103/PhysRevB.75.193101
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/128679
dc.subjectStrongly Correlated Electrons
dc.titleLocal density of states and Friedel oscillations around a non-magnetic impurity in unconventional density wave
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