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TT: Tiefe Temperaturen

TT 23: Nanoelektronik II: Spin-Elektronik

TT 23.4: Vortrag

Mittwoch, 10. März 2004, 18:15–18:30, H19

Semiclassical theory of weak antilocalization in chaotic systems. — •Oleg Zaitsev¹, Diego Frustaglia², and Klaus Richter¹ — ¹Universität Regensburg, Theoretische Physik, D-93040 Regensburg — ²Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy

We propose a semiclassical theory of weak antilocalization in clean ballistic systems with chaotic dynamics. Our approach is based on the semiclassical Landauer formula that we extended to include spin-orbit interaction. The general theory is applied to a chaotic billiard with Rashba interaction. We find that the spin relaxation in chaotic systems is considerably slower than in the diffusive systems. As a consequence, one expects different scales of the weak antilocalization in these cases.