Magnetic field dependence of localization radius on the dielectric side of metal-insulator transitions
Spivak В., Hui Lin Zhao, Shechao Feng
Magnetic field dependence of negative magnetoresistance (MR) in variable-range-hopping conduction is discussed. Above four dimensions, the negative MR saturates at large magnetic fields. In dimensions lower than four, the negative MR corresponds to a field-dependent correction to localization length. A qualitative coarse-graining picture is presented for such behaviors.