Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-01-14
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, pdflatex, 5 png figures To appear in Europhys. Lett
Scientific paper
The field induced switching of conductance in the charge ordered half-doped manganites is controlled by the combination of metastability, an inhomogeneous high field state, and cation disorder. We study this non-equilibrium problem via real space Monte Carlo on a disordered strong coupling model appropriate to the manganites. We reproduce the variation of the switching fields with the mean ionic radius r_A and cation disorder \sigma_A, and demonstrate how the experimental features arise from the proximity of several phases in the Landau free energy landscape. Our prediction for the field melted state is consistent with a growing body of experimental evidence.
Majumdar Pinaki
Mukherjee Anamitra
Pradhan Kalpataru
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