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Phases and Density of States in a Generalized Su-Schrieffer-Heeger Model

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arxiv cond-mat/0309298 v1 pith:Y34OI35P submitted 2003-09-12 cond-mat.str-el cond-mat.supr-con

classification cond-mat.str-elcond-mat.supr-con
keywords phasesgeneralizedmodelordersu-schrieffer-heegertheyalwaysaway
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Self-consistent solutions to a generalized Su-Schrieffer-Heeger model on a 2-dimensional square lattice are investigated. Away from half-filling, spatially inhomogeneous phases are found. Those phases may have topological structures on the flux order, large unit cell bond order, localized bipolarons, or they are simply short-range ordered and glassy. They have an universal feature of always possessing a gap at the Fermi level.

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