Conducting Jahn-Teller domain walls in undoped manganites

Journal Article · Fri Jan 01 04:00:00 EST 2010 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.81.245122· OSTI ID:988239

Salafranca Laforga, Juan I ^[1]; Yu, Rong ^[2]; Dagotto, Elbio R ^[1]

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1. ORNL
2. Rice University

We investigate the electronic properties of multidomain configurations in models for undoped manganites by means of variational and Monte Carlo techniques. These materials display simultaneous Jahn-Teller distortions and magnetic ordering. We find that a band of electronic states appears associated with Jahn-Teller domain walls, and this band is localized in the direction perpendicular to the walls. The energy and width of this band depend on the conformational properties of the domain walls. At finite temperatures, the conductance along the domain walls, induced by the localized domain-wall bands, is orders magnitude larger than in the bulk.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 988239
• Journal Information: Physical Review B, Journal Name: Physical Review B Journal Issue: 24 Vol. 81; ISSN 1098-0121; ISSN 1550-235X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DOMAIN STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRONIC STRUCTURE
JAHN-TELLER EFFECT
MANGANESE OXIDES
MONTE CARLO METHOD