Quantum Rings with Rashba spin orbit coupling: a path integral approach

Details Quantum Rings with Rashba spin orbit coupling: a path integral approach Quantum Rings with Rashba spin orbit coupling: a path integral approach

2007-03-08

arxiv.org/abs/cond-mat/0703216v2

Phys. Rev. B 76, 045324 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, 9 figures; Sec.VIII rewritten. Various minor modifications in the rest of the paper. Published version except for so

Scientific paper

10.1103/PhysRevB.76.045324

We employ a path integral real time approach to compute the DC conductance and spin polarization for electrons transported across a ballistic Quantum Ring with Rashba spin-orbit interaction. We use a piecewise semiclassical approximation for the particle orbital motion and solve the spin dynamics exactly, by accounting for both Zeeman coupling and spin-orbit interaction at the same time. Within our approach, we are able to study how the interplay between Berry phase, Ahronov Casher phase, Zeeman interaction and weak localization corrections influences the quantum interference in the conductance within a wide range of externally applied fields. Our results are helpful in inerpreting recent measurements on interferometric rings.

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