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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Official URL: http://link.aps.org/doi/10.1103/PhysRevLett.98.097...
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.
|Subjects:||Physical Science > Nanophysics|
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Electronics and Computer Science|
|Deposited On:||27 Jan 2009 09:57|
|Last Modified:||27 Jan 2009 09:57|
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