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Green's function theory for predicting device-to-device variability
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DOI：10.1103/PhysRevB.88.085420.png)
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摘要
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Due to random dopant fluctuations, the device-to-device variability is a serious challenge to emerging nanoelectronics. In this work we present theoretical formalisms and numerical simulations of quantum-transport variability, based on the Green's function technique and the multiple-scattering theory. We have developed a general formalism using the diagrammatic technique within the coherent-potential approximation that can be applied to a wide range of disorder concentrations. In addition, we have developed a method by using a perturbative expansion within the low-concentration approximation that is extremely useful for typical nanoelectronic devices having low dopant concentration. Applying both formalisms, transport fluctuations due to random impurities can be predicted without lengthy brute force computation of ensembles of device structures. Numerical implementations of the formalisms are demonstrated using both tight-binding models and first-principles models.
Keyword:
ELECTRONIC TRANSPORT
FLUCTUATIONS
MOSFETS
ALLOYS
期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
机构
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