Conditions for Adiabatic Spin Transport in Disordered Systems

Details Conditions for Adiabatic Spin Transport in Disordered Systems Conditions for Adiabatic Spin Transport in Disordered Systems

2003-05-05

arxiv.org/abs/cond-mat/0305076v1

Phys. Rev. B 68, 041303(R) (2003).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures. To appear in Phys. Rev. B (Rapid Communications)

Scientific paper

10.1103/PhysRevB.68.041303

We address the controversy concerning the necessary conditions for the observation of Berry phases in disordered mesoscopic conductors. For this purpose we calculate the spin-dependent conductance of disordered two-dimensional structures in the presence of inhomogeneous magnetic fields. Our numerical results show that for both, the overall conductance and quantum corrections, the relevant parameter defining adiabatic spin transport scales with the square root of the number of scattering events, in generalization of Stern's original proposal [Phys. Rev. Lett. 68, 1022 (1992)]. This could hinder a clear-cut experimental observation of Berry phase effects in diffusive metallic rings.

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