The Effect of Disorder in an Orbitally Ordered Jahn-Teller Insulator

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dc.creatorKumar, Sanjeev
dc.creatorKampf, Arno P.
dc.creatorMajumdar, Pinaki
dc.date2006-09-28
dc.date.accessioned2026-07-07T08:56:54Z
dc.date.available2026-07-07T08:56:54Z
dc.descriptionWe study a two dimensional, two-band double-exchange model for $e_g$ electrons coupled to Jahn-Teller distortions in the presence of quenched disorder using a recently developed Monte-Carlo technique. In the absence of disorder the half-filled system at low temperatures is an orbitally ordered ferromagnetic insulator with a staggered pattern of Jahn-Teller distortions. We examine the finite temperature transition to the orbitally disordered phase and uncover a qualitative difference between the intermediate and strongly coupled systems, including a thermally driven insulator to metal crossover in the former case. Long range orbital order is suppressed in the presence of disorder and the system displays a tendency towards metastable states consisting of orbitally disordered stripe-like structures enclosing orbitally ordered domains.
dc.description10 pages, 9 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0609734
dc.identifierhttp://arxiv.org/abs/cond-mat/0609734
dc.identifierPhys. Rev. B {\bf 75}, 014209 (2007)
dc.identifierdoi:10.1103/PhysRevB.75.014209
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/146776
dc.subjectStrongly Correlated Electrons
dc.subjectDisordered Systems and Neural Networks
dc.titleThe Effect of Disorder in an Orbitally Ordered Jahn-Teller Insulator
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