Eur. Phys. J. B (2014) 87: 239
https://doi.org/10.1140/epjb/e2014-50233-y

Regular Article

A real space description of magnetic field induced melting in the charge ordered manganites: II. The disordered case

¹ Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
² Harish-Chandra Research Institute, Chhatnag Road, Jhusi, Allahabad 211019, India

^a e-mail: amukher5@utk.edu

Received: 8 April 2014
Received in final form: 10 August 2014
Published online: 20 October 2014

Abstract

We study the effect of A site disorder on magnetic field induced melting of charge order (CO) in half doped manganites 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 field melting transition due to disorder and explain the unusual dependence of the melting scales on bandwidth and disorder. In combination with our companion paper on field melting of charge order in clean systems we provide an unified understanding of CO melting across all half doped manganites.