Spin Stripes of the 2D Electron Gas in a Periodic Hyperfine Field

Abstract

A novel periodic spin structure induced in a two-dimensional electron gas by a periodic hyperfine field is proposed and theoretically studied. The periodic nuclear magnetization is created, via the hyperfine electron−nuclear spin interaction, by the light induced periodic electron spin grating. The optically excited electron spin polarization rapidly vanishes after the laser beam grating is switched off, while the inhomogeneous nuclear spin polarization remains for a sufficiently long time, which makes possible the writing and storage of information. Such a process represents a basis for nuclear spin holography. The electron wave functions and energy spectra are calculated. The conditions of the periodic structure parametric excitation are obtained and the experimental feasibility is discussed. The possible applications to future quantum computation and communication devices are outlined.