Re-entrant Behavior and Gigantic Response in Disordered Spin-Peierls System

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dc.creatorSeo, Hitoshi
dc.creatorMotome, Yukitoshi
dc.creatorNagaosa, Naoto
dc.date2004-06-17
dc.date.accessioned2026-07-07T02:58:40Z
dc.date.available2026-07-07T02:58:40Z
dc.descriptionEffects of disorder and external field on the competing spin-Peierls and antiferromagnetic states are studied theoretically in terms of the numerical transfer matrix method applied to a quasi one-dimensional spin 1/2 Heisenberg model coupled to the lattice degree of freedom. We show that, at temperatures above the impurity-induced antiferromagnetic phase, inhomogeneous spin-Peierls lattice distortions remain to exist showing a re-entrant behavior. This feature can be drastically altered by very weak perturbations, e.g., the staggered magnetic field or the change in interchain exchange coupling $J_\perp$, leading to a huge response, which is analogous to the colossal magnetoresistance phenomenon in perovskite manganese oxides.
dc.description5 pages including 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0406386
dc.identifierhttp://arxiv.org/abs/cond-mat/0406386
dc.identifierPhys. Rev. B 70, 060403 (2004)
dc.identifierdoi:10.1103/PhysRevB.70.060403
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24194
dc.subjectStrongly Correlated Electrons
dc.subjectStatistical Mechanics
dc.titleRe-entrant Behavior and Gigantic Response in Disordered Spin-Peierls System
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