Intermediate-Coupling Theory for the Spectral Weight of Spin Polaron

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dc.creatorYang, Min-Fong
dc.date1996-07-29
dc.date.accessioned2026-07-07T06:26:22Z
dc.date.available2026-07-07T06:26:22Z
dc.descriptionWithin the intermediate-coupling theory, the quasiparticle weight $Z$ of one hole injected in the undoped antiferromagnetic ground state is studied. We find that, for the hole located at the quasiparticle band minimun with momentum ${\bf k}_0 = (\pm \fracπ{2}, \pm \fracπ{2})$, $Z$ is finite. By comparing the results obtained by the self-consistent Born approximation, we show that the intermediate-coupling theory for $Z$ is appropriate only when $J/t \stackrel{>}{\sim} 1.6$. Finally, the reason why this approach fails in the small-$J$ case will also be clarified.
dc.description4 pages, RevTeX, 2 PS figures
dc.identifierhttps://arxiv.org/abs/cond-mat/9607204
dc.identifierhttp://arxiv.org/abs/cond-mat/9607204
dc.identifierPhys. Rev. B 55, 56 (1997)
dc.identifierdoi:10.1103/PhysRevB.55.56
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/97086
dc.subjectCondensed Matter
dc.titleIntermediate-Coupling Theory for the Spectral Weight of Spin Polaron
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