Nano Archive

Coulomb Interactions and Nanoscale Electronic Inhomogeneities in Manganites

Shenoy, Vijay B. and Gupta, Tribikram and Krishnamurthy, H. R and Ramakrishnan, T. V (2007) Coulomb Interactions and Nanoscale Electronic Inhomogeneities in Manganites. Physical Review Letters, 98 (9). 097201-1-097201-4.

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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:Article
Subjects:Physical Science > Nanophysics
Divisions:Faculty of Engineering, Science and Mathematics > School of Electronics and Computer Science
ID Code:3745
Deposited By:JNCASR
Deposited On:27 Jan 2009 09:57
Last Modified:27 Jan 2009 09:57

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