Journal ArticleDOI
Hot electron diffusion
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TLDR
In this article, a simple expression relating the hot-electron diffusion constant with the differental mobility is derived, and it is found that for some conditions the constant may be even negative.About:
This article is published in Physics Letters A.The article was published on 1974-05-20. It has received 8 citations till now. The article focuses on the topics: Fick's laws of diffusion & Diffusion (business).read more
Citations
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Journal ArticleDOI
Differential relaxation times and diffusivities of hot carriers in isotropic semiconductors
J. P. Nougier,M. Rolland +1 more
TL;DR: In this paper, it was shown that the distribution function for hot carriers may be a displaced Maxwellian only if τ (k) is k independent, which does not hold for most of the situations of physical interest.
Journal ArticleDOI
Superlinear electron transport and noise in quantum wires
TL;DR: In this article, a Monte Carlo simulation of electron transport and noise in GaAs rectangular quasi-one-dimensional quantum wire structures at low temperatures is presented. And the authors show that with the heating of electron gas the efficiency of acoustic phonon scattering decreases and the mobility increases.
Posted Content
Geodesics deviation equation approach to chaos
TL;DR: In this paper, the geodesics deviation equation (GDE) is itroduced in "adiabatic" approximation and Perturbation theory in general case is formulated.
Journal ArticleDOI
Geodesic Deviation Equation Approach to Chaos
J. Szczesny,T. Dobrowolski +1 more
TL;DR: In this article, a geodesic deviation equation is introduced and a geometrical criterion of local instability which may lead to chaos is formulated, and its exact solution is found in an "adiabatic" approximation.
Journal ArticleDOI
Sectional curvature in the dynamics of gravitational systems
TL;DR: In this paper, the authors focus on mathematical aspects of determining local instability by using invariant characteristics of an internal Riemannian geometry with a Jacobi metric and give formulae for determining the sign of the sectional curvature and the separation rate of nearby trajectories for systems with a natural lagrangian.
References
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Journal ArticleDOI
Effect of field-dependent diffusion on stable domain propagation in the Gunn effect
P N Butcher,W Fawcett,N R Ogg +2 more
TL;DR: In this article, the properties of uniformly propagating stable domains in gallium arsenide are calculated on the basis of recently computed velocity-field and diffusion-field characteristics, and the maximum velocity difference increases with decreasing resistivity and is about 25% of the drift velocity in 1 Ω cm material.
Journal ArticleDOI
Stable domain propagation in the Gunn effect
P N Butcher,W Fawcett +1 more
TL;DR: The properties of uniformly propagating stable domains are calculated using a constant diffusion coefficient of 178 cm2 sec-1 and an analytic approximation to a recently computed static velocity-field characteristic for gallium arsenide as mentioned in this paper.
Journal ArticleDOI
Gunn Domain Dynamics
TL;DR: In this article, a phenomenological equation for the motion of carriers in a Gunn diode is written in terms of an average drift velocity and an average diffusion coefficient, both of which are functions of the field only.
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