Signatures of driven magnons in electronic conductance of a magnetic nanowire

Abstract

In this paper, we study the effect of the driven magnons on the electronic magnetoconductance of an anti-/ferromagnetic quantum wire which is connected to two magnetic chains. The proposed model is based on Green’s function technique within the nearest neighbor tight-binding approach and using a semiclassical approximation for the dynamics of magnetic moments. Due to the existence of the external time-periodic magnetic field, the time-average of the electronic transmission coefficient is presented. This quantity is investigated as a function of external field properties and damping force. The numerical results indicate that the conductance of the magnetic quantum wire has the most decrease at frequencies of external field corresponding to magnonic eigenfrequencies of the center wire. The strong damping forces diminish the effect of the external magnetic field specially at the frequencies corresponding to magnonic eigenfrequencies.