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Coulomb Interactions and Nanoscale Electronic Inhomogeneities in Manganites

Shenoy, Vijay B and Gupta, Tribikram and Krishnamurthy, HR and Ramakrishnan, TV (2007) Coulomb Interactions and Nanoscale Electronic Inhomogeneities in Manganites. In: Physical Review Letters, 98 (9). 097201:1 -4.

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We study electronic inhomogeneities in manganites using simulations on a microscopic model with Coulomb interactions amongst two electronic fluids—one localized (polaronic), the other extended—and dopant ions. The long range Coulomb interactions frustrate phase separation induced by the large on site repulsion between the fluids. A single phase ensues which is inhomogeneous at a nanoscale, but homogeneous on mesoscales, with many features that agree with experiments. This, we argue, is the origin of nanoscale inhomogeneities in manganites, rather than phase competition or disorder effects.

Item Type: Journal Article
Publication: Physical Review Letters
Publisher: American Physical Society
Additional Information: Copyright of this article belongs to the American Physical Society.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 02 Apr 2007
Last Modified: 19 Sep 2010 04:37
URI: http://eprints.iisc.ac.in/id/eprint/10583

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