Classical advection of guiding centers in a random magnetic field
Physics, Stanford University, Stanford, CA 94305-4060, USA
2 Materials Deparment, University of California at Santa Barbara, Santa Barbara, CA 93106, USA
Accepted: 19 February 1998
We investigate theoretically and experimentally classical advective transport in a 2D electron gas in a random magnetic field. For uniform external perpendicular magnetic fields large compared to the random field we observe a strong enhancement of conductance compared to the ordinary Drude value. This can be understood as resulting from advection of cyclotron guiding centers. For low disorder this enhancement shows non-trivial scaling as a function of scattering time, with consistency between theory and experiment.
PACS: 73.50.Jt – Galvanomagnetic and other magnetotransport effects (including thermomagnetic effects) / 73.40.Hm – Quantum Hall effect (integer and fractional) / 05.60.+w – Transport processes: theory
© EDP Sciences, 1998