Two-dimensional charge order in layered 2-1-4 perovskite oxides

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dc.creatorOnoda, Shigeki
dc.creatorMotome, Yukitoshi
dc.creatorNagaosa, Naoto
dc.date2002-11-23
dc.date2004-02-02
dc.date.accessioned2026-07-07T02:48:19Z
dc.date.available2026-07-07T02:48:19Z
dc.descriptionMonte Carlo simulations are performed on the three-dimensional (3D) Ising model with the 2-1-4 layered perovskite structure as a minimal model for checkerboard charge ordering phenomena in layered perovskite oxides. Due to the interlayer frustration, only 2D long-range order emerges with a finite correlation length along the c axis. Critical exponents of the transition change continuously as a function of the interlayer coupling constant. The interlayer long-range Coulomb interaction decays exponentially and is negligible even between the second-neighbor layers. Instead, monoclinic distortion of a tetragonal unit cell lifts the macroscopic degeneracy to induce a 3D charge ordering. The dimensionality of the charge order in La$_{0.5}$Sr$_{1.5}$MnO$_4$ is discussed from this viewpoint.
dc.description5 pages including 6 figures, with major changes including discussion on charge ordering phenomena in layered perovskite oxides
dc.identifierhttps://arxiv.org/abs/cond-mat/0211520
dc.identifierhttp://arxiv.org/abs/cond-mat/0211520
dc.identifierPhys. Rev. Lett. 92, 236403 (2004)
dc.identifierdoi:10.1103/PhysRevLett.92.236403
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/20360
dc.subjectStatistical Mechanics
dc.subjectStrongly Correlated Electrons
dc.titleTwo-dimensional charge order in layered 2-1-4 perovskite oxides
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