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The European Physical Journal B

, Volume 79, Issue 3, pp 371–376 | Cite as

Noise-created bistability and stochastic resonance of impurities diffusing in a semiconductor layer

  • M. Asfaw
  • B. Aragie
  • M. Bekele
Article

Abstract

We investigate the dynamics of impurities walking along a semiconductor layer assisted by thermal noise of strength D and external harmonic potential V(x). Applying a nonhomogeneous hot temperature in the vicinity of the potential minimum may modify the external potential into a bistable effective potential. We propose the ways of mobilizing and eradicating the unwanted impurities along the semiconductor layer. Furthermore, the thermally activated rate of hopping for the impurities as a function of the model parameters is studied in high barrier limit. Via two state approximation, we also study the stochastic resonance (SR) of the impurities dynamics where the same noise source that induces the dynamics also induces the transition from mono-stable to bistable state which leads to SR in the presence of time varying field.

Keywords

Stochastic Resonance Parameter Choice Potential Minimum Semiconductor Layer Noise Strength 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  1. 1.Department of Physics and AstronomyCalifornia State University NorthridgeNorthridgeUSA
  2. 2.Department of PhysicsAddis Ababa UniversityAddis AbabaEthiopia

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