Spin Precession and Oscillations in Mesoscopic Systems

Details Spin Precession and Oscillations in Mesoscopic Systems Spin Precession and Oscillations in Mesoscopic Systems

2002-12-12

arxiv.org/abs/cond-mat/0212308v1

Phys. Rev. B 69, 075319 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 5 figures

Scientific paper

10.1103/PhysRevB.69.075319

We compare and contrast magneto-transport oscillations in the fully quantum (single-electron coherent) and classical limits for a simple but illustrative model. In particular, we study the induced magnetization and spin current in a two-terminal double-barrier structure with an applied Zeeman field between the barriers and spin disequilibrium in the contacts. Classically, the spin current shows strong tunneling resonances due to spin precession in the region between the two barriers. However, these oscillations are distinguishable from those in the fully coherent case, for which a proper treatment of the electron phase is required. We explain the differences in terms of the presence or absence of coherent multiple wave reflections.

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