Transport in lateral surface superlattices
- 15 March 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 27 (6), 3483-3493
- https://doi.org/10.1103/physrevb.27.3483
Abstract
A numerical Monte Carlo simulation is carried out to find the velocity and energy as a function of the electric field for a surface superlattice structure. The energy is found to saturate at the half-filled-band energy, while the velocity displays a negative differential conductivity. The scattering rates included in the Monte Carlo routine have Van Hove singularities arising from the electron density of states. This singularity is removed by including a self-energy correction to the electron Green's function. The simulations indicate that the negative differential conductivity is due to Bloch oscillations of the electrons.Keywords
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