Magnetotransport in inhomogeneous magnetic fields

Details Magnetotransport in inhomogeneous magnetic fields Magnetotransport in inhomogeneous magnetic fields

2004-11-10

arxiv.org/abs/cond-mat/0411248v1

Phys. Rev. B67, 165309 (2003)

Physics

Condensed Matter

Disordered Systems and Neural Networks

5 pages, 5 figures

Scientific paper

10.1103/PhysRevB.67.165309

Quantum transport in inhomogeneous magnetic fields is investigated numerically in two-dimensional systems using the equation of motion method. In particular, the diffusion of electrons in random magnetic fields in the presence of additional weak uniform magnetic fields is examined. It is found that the conductivity is strongly suppressed by the additional uniform magnetic field and saturates when the uniform magnetic field becomes on the order of the fluctuation of the random magnetic field. The value of the conductivity at this saturation is found to be insensitive to the magnitude of the fluctuation of the random field. The effect of random potential on the magnetoconductance is also discussed.

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