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Solitary-wave dynamics in extrinsic semiconductors under dc voltage bias
Rodríguez Cantalapiedra, Inma; Bonilla, Luis L.; Bergmann, Michael J.; Teitsworth, Stephen W.
Universitat Politècnica de Catalunya. Departament de Física Aplicada; Universitat Politècnica de Catalunya. NOLIN - Física No-Lineal i Sistemes Fora de l'Equilibri
Numerical-simulation results are presented for a simple drift-diffusion model which describes timedependent and nonlinear electrical transport properties of extrinsic semiconductors under timeindependent (dc) voltage bias. Simulations for finite-length samples with Ohmic boundary conditions yield dynamically stable solitary space-charge waves that travel periodically across the sample. Numerical estimates of wave speed, the wave size, and onset phenomena are in excellent agreement with recent experiments in p-type germanium.
Peer Reviewed
Àrees temàtiques de la UPC::Matemàtiques i estadística::Equacions diferencials i integrals
High-field and nonlinear effects
Nonlinearity, bifurcation, and symmetry breaking
Dinàmica molecular
American Physical Society

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