A Real Space Description of Field Induced Melting in the Charge Ordered Manganites: II. the Disordered Case

Details A Real Space Description of Field Induced Melting in the Charge Ordered Manganites: II. the Disordered Case A Real Space Description of Field Induced Melting in the Charge Ordered Manganites: II. the Disordered Case

2008-11-24

arxiv.org/abs/0811.3746v1

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, pdflatex, 10 embedded png figs

Scientific paper

The effect of A site disorder on the magnetic field induced melting of charge order (CO) in half doped manganites has been studied using a Monte-Carlo technique. Strong A-site disorder destroys CO even without an applied field. At moderate disorder, the zero field CO state survives but has several intriguing features in its field response. Our spatially resolved results track the broadening of the first order field melting transition due to disorder, explain the unusual dependence of the melting scales on bandwidth and disorder, and allow an unified understanding of CO melting across all manganites. We also present some results on disorder assisted trapping of metastable phases in the low temperature state as seen in recent experiments.

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