E-Prints Complutense

Self-sustained current oscillations in the kinetic theory of semiconductor superlattices



Último año

Cebrián, E. y Bonilla, L.L- y Carpio, Ana (2009) Self-sustained current oscillations in the kinetic theory of semiconductor superlattices. Journal of Computational Physics, 228 (20). pp. 7869-7705. ISSN 0021-9991

[img] PDF
Restringido a Sólo personal autorizado del repositorio hasta 2020.

Vista previa

URL Oficial: http://www.sciencedirect.com/science/article/pii/S002199910900388X

URLTipo de URL


We present the first numerical solutions of a kinetic theory description of self-sustained current oscillations in n-doped semiconductor superlattices. The governing equation is a single-miniband Boltzmann-Poisson transport equation with a BGK (Bhatnagar-Gross-Krook) collision term. Appropriate boundary conditions for the distribution function describe electron injection in the contact regions. These conditions seamlessly become Ohm's law at the injecting contact and the zero charge boundary condition at the receiving contact when integrated over the wave vector. The time-dependent model is numerically solved for the distribution function by using the deterministic Weighted Particle Method. Numerical simulations are used to ascertain the convergence of the method. The numerical results confirm the validity of the Chapman-Enskog perturbation method used previously to derive generalized drift-diffusion equations for high electric fields because they agree very well with numerical solutions thereof.

Tipo de documento:Artículo
Palabras clave:Semiconductor superlattice Boltzmann–BGK–Poisson kinetic equation Contact boundary conditions Self-sustained current oscillations Particle methods
Materias:Ciencias > Física > Física del estado sólido
Ciencias > Física > Hidrodinámica
Código ID:14904
Depositado:19 Abr 2012 09:24
Última Modificación:28 Oct 2016 08:29

Descargas en el último año

Sólo personal del repositorio: página de control del artículo