Influence of a magnetic field on the mutual rectification of alternating currents induced by electromagnetic waves in graphene

The direct component of the electric current induced in graphene placed in a constant magnetic field has been found in the case where two electromagnetic waves with two mutually perpendicular planes of polarization are normally incident on the surface of the sample. It has been demonstrated that the direct component of the current along the direction of the electric field vector of the wave with the frequency $\omega_1$ arises only when the ratio between the frequencies of the incident waves is $\omega_1/\omega_2$ = 2 or 1/2. In the latter case, the direct current component appears only in the presence of a magnetic field.