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Title
A sharp decrease of resistivity in La[sub 0.7]Ca[sub 0.3]Mn[sub 0.96]Cu[sub 0.04]O[sub 3]: Evidence for Cu-assisted coherent tunneling of spin polarons.
Studies a decrease in resistivity in La[sub 0.7]Ca[sub 0.3]Mn[sub 0.96]Cu sub 0.04]O[sub 3] after doping at the manganese site. Link of the phenomenon to a decrease in spin-polaron energy; Copper-induced modifications of the manganese-spin-dominated zero-temperature spontaneous magnetization.