Coulomb interactions and nanoscale electronic inhomogeneities in manganites

Shenoy, Vijay B. ; Gupta, Tribikram ; Krishnamurthy, H. R. ; Ramakrishnan, T. V. (2007) Coulomb interactions and nanoscale electronic inhomogeneities in manganites Physical Review Letters, 98 (9). 097201_1-097201_4. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v98/i9/e097201

Related URL: http://dx.doi.org/10.1103/PhysRevLett.98.097201

Abstract

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:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:17561
Deposited On:16 Nov 2010 09:33
Last Modified:17 May 2016 02:11

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