Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2000-11-09
Found. Phys. 31, 399 (2001).
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
15 pages, 6 figures. Accepted for publication in Foundations of Physics
Scientific paper
We study the influence of nonuniform magnetic fields on the magneto conductance of mesoscopic microstructures. We show that the coupling of the electron spin to the inhomogenous field gives rise to effects of the Berry phase on ballistic quantum transport and discuss adiabaticity conditions required to observe such effects. We present numerical results for different ring geometries showing a splitting of Aharonov-Bohm conductance peaks for single rings and corresponding signatures of the geometrical phase in weak localization. The latter features can be qualitatively explained in a semiclassical approach to quantum transport.
Frustaglia Diego
Richter Klaus
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