On the physics and modeling of small semiconductor devices-II. The very small device

J. R. Barker, D. K. Ferry

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

In a previous paper, we attempted to lay a conceptual framework for an ultimate physics of small semiconductor devices and concentrated on the medium small device. Here we treat the very small device (VSD), characterized by an effective channel length of 250 Å. We demonstrate how such a device could conceivably be fabricated using two side processing of the wafer. In treating the transport, however, it is found that the time and distance scales are such that the Boltzmann transport equation is completely invalidated. Here we develop the appropriate quantum transport equations based upon the density matrix for the entire system, device plus boundaries plus environment. It is found that the boundaries and environment can lead to renormalization of the energy spectrum as well as long range dissipative interactions. Two special cases of the transport equations are treated. If the transport is dominantly stochastic, an exact Langevin equation is found for the various transport parameters. In a second case, a parameterized density matrix is used in analogy to the displaced Maxwellian. In this latter case, a hierarchy of moment equations can be developed to yield, e.g. energy and momentum balance equations.

Original languageEnglish (US)
Pages (from-to)531-544
Number of pages14
JournalSolid State Electronics
Volume23
Issue number6
DOIs
StatePublished - 1980
Externally publishedYes

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Semiconductor devices
semiconductor devices
Momentum
Physics
physics
Processing
Boltzmann transport equation
hierarchies
energy spectra
wafers
moments
momentum
interactions
energy

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

On the physics and modeling of small semiconductor devices-II. The very small device. / Barker, J. R.; Ferry, D. K.

In: Solid State Electronics, Vol. 23, No. 6, 1980, p. 531-544.

Research output: Contribution to journalArticle

Barker, J. R. ; Ferry, D. K. / On the physics and modeling of small semiconductor devices-II. The very small device. In: Solid State Electronics. 1980 ; Vol. 23, No. 6. pp. 531-544.
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