1304.5474 (F. C. Bauke et al.)

Hot Brownian Carriers in the Langevin Picture: Application to a simple
model for the Gunn Effect in GaAs    [PDF]

F. C. Bauke, R. E. Lagos

We consider a charged Brownian gas under the influence of external, static and uniform electric and magnetic fields, immersed in a uniform bath temperature. We obtain the solution for the associated Langevin equation, and thereafter the evolution of the nonequilibrium temperature towards a nonequilibrium (hot) steady state. We apply our results to a simple yet relevant Brownian model for carrier transport in GaAs. We obtain a negative differential conductivity regime (Gunn effect) and discuss and compare our results with experimental results.

View original: http://arxiv.org/abs/1304.5474