Conducting Jahn-Teller Domain Walls in Undoped Manganites

Details Conducting Jahn-Teller Domain Walls in Undoped Manganites Conducting Jahn-Teller Domain Walls in Undoped Manganites

2010-05-26

arxiv.org/abs/1005.4918v1

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 5 figures, submitted to PRB

Scientific paper

We investigate the electronic properties of multi-domain 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 depends 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.

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