Effect of ionization of impurity centres by electric field on the conductivity of superlattice

S. Y. Mensah; F. K.A. Allotey; A. Clement

doi:10.1006/spmi.1996.0018

Effect of ionization of impurity centres by electric field on the conductivity of superlattice

S. Y. Mensah, F. K.A. Allotey, A. Clement

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The electric field E₀ effect on ionization on impurity centres and on the conductivity of superlattices (SLs) has been studied theoretically. It is observed that as the field E₀ increases the current rises, reaches a maximum, then falls off, i.e. show a negative differential conductivity (NDC). Further increase in E₀ leads to an exponential rise of the current. This occurs around E₀ = 3 × 10⁴ V cm^-1. Hence the current density field shows a 'N' shape characteristics as against the 'n' shape characteristics in the absence of impurity.

Original language	English (US)
Pages (from-to)	151-158
Number of pages	8
Journal	Superlattices and Microstructures
Volume	19
Issue number	2
DOIs	https://doi.org/10.1006/spmi.1996.0018
State	Published - Mar 1996

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1006/spmi.1996.0018

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title = "Effect of ionization of impurity centres by electric field on the conductivity of superlattice",

abstract = "The electric field E0 effect on ionization on impurity centres and on the conductivity of superlattices (SLs) has been studied theoretically. It is observed that as the field E0 increases the current rises, reaches a maximum, then falls off, i.e. show a negative differential conductivity (NDC). Further increase in E0 leads to an exponential rise of the current. This occurs around E0 = 3 × 104 V cm-1. Hence the current density field shows a 'N' shape characteristics as against the 'n' shape characteristics in the absence of impurity.",

author = "Mensah, {S. Y.} and Allotey, {F. K.A.} and A. Clement",

note = "Funding Information: Acknowledgements—Two of the authors would like to thank Professor Abdus Salam, the International Atomic Energy Agency and UNESCO for hospitality at the International Centre for Theoretical Physics, Trieste. (S.Y.M.) would also like to thank the Swedish Agency for Research Cooperation with Developing Countries (SAREC) for financial support during his visit at the ICTP under the Associateship scheme. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

year = "1996",

month = mar,

doi = "10.1006/spmi.1996.0018",

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pages = "151--158",

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AU - Mensah, S. Y.

AU - Allotey, F. K.A.

AU - Clement, A.

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PY - 1996/3

Y1 - 1996/3

N2 - The electric field E0 effect on ionization on impurity centres and on the conductivity of superlattices (SLs) has been studied theoretically. It is observed that as the field E0 increases the current rises, reaches a maximum, then falls off, i.e. show a negative differential conductivity (NDC). Further increase in E0 leads to an exponential rise of the current. This occurs around E0 = 3 × 104 V cm-1. Hence the current density field shows a 'N' shape characteristics as against the 'n' shape characteristics in the absence of impurity.

AB - The electric field E0 effect on ionization on impurity centres and on the conductivity of superlattices (SLs) has been studied theoretically. It is observed that as the field E0 increases the current rises, reaches a maximum, then falls off, i.e. show a negative differential conductivity (NDC). Further increase in E0 leads to an exponential rise of the current. This occurs around E0 = 3 × 104 V cm-1. Hence the current density field shows a 'N' shape characteristics as against the 'n' shape characteristics in the absence of impurity.

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Effect of ionization of impurity centres by electric field on the conductivity of superlattice

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