Abstract
From the transport studies in the bilayer manganites LaSr2−x Ca x Mn2O7, we have found the variable-range hopping model proposed by Viret et al to be inadequate to describe the transport of charge in these materials. The polarons appear to hop to their nearest neighbors with an activation energy, which in part is dependent on the magnetic interactions in the lattice.
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Bhatia, S., Yassin, O.A. Effect of doping Ca on polaron hopping in LaSr2Mn2O7 . Pramana - J Phys 58, 1061–1063 (2002). https://doi.org/10.1007/s12043-002-0217-y
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DOI: https://doi.org/10.1007/s12043-002-0217-y