Abstract
We study both classical and quantum transports in two-dimensional electron gas (2DEG) numerically, where magnetic fields are applied perpendicular to the plane of 2DEG and are periodically modulated. Due to the non-homogeneous magnetic fields, the system becomes chaotic. In the classical model, we show the commensurability oscillation of magnetoresistance in periodic magnetic fields. The negative magnetoresistance is observed when the conductivity σ xx is small. The quantum transport is also investigated, and the universal conductance fluctuations as well as the fractal behavior of the magnetoconductance are observed.
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More From: Physica E: Low-dimensional Systems and Nanostructures
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