Excitation Spectrum for Quantum Spin Systems with Ladder, Plaquette and Mixed-Spin Structures

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dc.creatorKoga, Akihisa
dc.creatorKawakami, Norio
dc.date1999-08-31
dc.date.accessioned2026-07-07T03:14:24Z
dc.date.available2026-07-07T03:14:24Z
dc.descriptionBy using the series expansion techniques, we study the excitation spectrum for the two-dimensional quantum spin systems with ladder, plaquette and mixed-spin structures. We calculate the spin excitation gap and thus determine the phase boundary between the spin-gap phase and the magnetically ordered phase rather precisely. It is found that the phase diagram obtained improves fairly well the one previously obtained via the ground-state susceptibility.
dc.description9 pages, submitted to Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/9908458
dc.identifierhttp://arxiv.org/abs/cond-mat/9908458
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/29653
dc.subjectStrongly Correlated Electrons
dc.titleExcitation Spectrum for Quantum Spin Systems with Ladder, Plaquette and Mixed-Spin Structures
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