Microscopic derivation of transport coefficients and boundary conditions in discrete drift-diffusion models of weakly coupled superlattices

Article

关键词: NEGATIVE DIFFERENTIAL CONDUCTIVITY;    CURRENT SELF-OSCILLATIONS;    DOUBLE-QUANTUM-WELL;    SEMICONDUCTOR SUPERLATTICES;    GAAS/ALAS SUPERLATTICES;    DYNAMICAL LOCALIZATION;    DOUBLE-BARRIER;    MINIBAND;    FIELD;    CONDUCTANCE;   

DOI  :  10.1103/PhysRevB.62.2786

来源: SCIE

【 摘 要 】

A discrete drift-diffusion model is derived from a microscopic sequential tunneling model of charge transport in weakly-coupled superlattices provided temperatures are low or high enough. Realistic transport coefficients and contact current-field characteristic curves are calculated from microscopic expressions; knowing the design parameters of the superlattice. Boundary conditions clarify when possible self-sustained oscillations of the current are due to monopole or dipole recycling.

【 授权许可】

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