Step conductance and spin selectivity in a one dimensional tailored conical magnet

Abstract

Using an S-matrix formulation we evaluate the conductance of a one dimensional free electron gas in double exchange interaction with a classical conical magnet. We find integer conductance steps depending on the energy window of the incoming electrons for conical magnets described by a fictitious magnetic field of different orientations and modulated profile. The conductance windows, that we attribute to potential or diffractive scattering, are characterised by spin selectivity depending on the fictitious magnetic field direction and chirality. Furthermore, we study the conductance of a conical soliton lattice and discuss a rationalization of all the conductance data for an incoming electron with arbitrary spin direction in terms of scattering of an electron with spin along the conical axis.