Quasi-particle dynamics of a strongly correlated polaron metal

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dc.creatorZhong, J.
dc.creatorSchuttler, H. -B.
dc.date1998-09-29
dc.date.accessioned2026-07-07T03:11:36Z
dc.date.available2026-07-07T03:11:36Z
dc.descriptionWe develop a simple diagrammatic low-energy boson exchange strong-coupling model for an antiferromagnetically correlated polaronic metal. Important low-temperature features of such a model are (i) a large polaronic mass enhancement $Z$ and a strongly narrowed, low-energy, near-Fermi-level van Hove resonance peak in the interacting density of states at temperatures $T$ well below the lattice tunneling energy scale $Ω_t$; (ii) a rapid thermal suppression of $Z$ and of the van Hove resonance which occurs when the temperature $T$ becomes comparable to the lattice tunneling excitation energy scale $Ω_t$; and (iii) strong isotopic mass dependence of the electronic mass enhancement $Z$ at temperatures $T$ well below $Ω_t$. Surprisingly, in spite of the large low-$T$ mass enhancment, the anharmonic lattice fluctuations in the high temperature regime $T\gsimΩ_t$, give rise only to a moderate, essentially $T$-independent quasi-particle damping. We suggest possible low temperature isotope experiments to explore polaronic fluctuations in the cuprates superconductors.
dc.descriptionPlain TeX + 4 PostScript Figures
dc.identifierhttps://arxiv.org/abs/cond-mat/9809383
dc.identifierhttp://arxiv.org/abs/cond-mat/9809383
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/28631
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleQuasi-particle dynamics of a strongly correlated polaron metal
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