Transverse magneto-conductivity of diluted magnetic semiconductor quantum wires

We calculated the transverse dc electrical conductivity of a quasi-one-dimensional semiconductor quantum wire in a magnetic field normal to the barriers of the wire, and studied the electron-magnon interaction in DMS using linear response theory. The electron gas was assumed as quasi-one-dimensional, while the magnons were considered to be bulk type. The transverse dc electrical conductivity of quantum wires of diameter W (similar to 0.1 pm) much larger than the magnetic length l(b) and much smaller than the mean free path l(e) (e.g., l(b) << W << l(e)) was modelled with a parabolic potential of frequency Omega, and leads to a shift of the magneto-magnon resonance peaks to smaller magnetic fields. Moreover, the magneto-conductivity sigma(xx) decreases when the confinement becomes stronger (when the wire diameter decreases). Numerical results are presented for a Ga1-xMnxAs quasi-one-dimensional wire, where we present the appropriate conditions for use of these structures in spintronic applications and devices.