Magnetic phase diagram of the half-filled t-t'-Hubbard model -- finite-U effects on competing interactions and frustration

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dc.creatorSingh, Avinash
dc.date2001-12-24
dc.date.accessioned2026-07-07T02:43:57Z
dc.date.available2026-07-07T02:43:57Z
dc.descriptionThe magnon propagator is evaluated in the AF (π,π,π) and the F-AF (0,π,π) states at the RPA level, and the spin-fluctuation corrections are compared. Transverse spin fluctuations are sharply enhanced by the frustration- inducing NNN hopping t', reducing the zero-temperature AF order in two dimensions, and the Neel temperature in three dimensions. The phase boundary between the insulating AF and F-AF states is obtained in the full range of interaction strength, indicating that the AF state is interestingly stabilized with decreasing U.
dc.description8 pages
dc.identifierhttps://arxiv.org/abs/cond-mat/0112442
dc.identifierhttp://arxiv.org/abs/cond-mat/0112442
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/18712
dc.subjectStrongly Correlated Electrons
dc.titleMagnetic phase diagram of the half-filled t-t'-Hubbard model -- finite-U effects on competing interactions and frustration
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