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Temperature-dependent subband mobility characteristics in n-doped silicon junctionless nanowire transistor

2019-07-04

Authors: Dou, YM; Han, WH; Guo, YY; Zhao, XS; Zhang, XD; Wu, XY; Yang, FH
CHINESE PHYSICS B
Volume: 28 Issue: 6 Published: JUN 2019 Language: English Document type: Article
DOI: 10.1088/1674-1056/28/6/066804
Abstract:
We have investigated the temperature-dependent effective mobility characteristics in impurity band and conduction subbands of n-doped silicon junctionless nanowire transistors. It is found that the electron effective mobility of the first subband in 2-fold valleys is higher than that of the second subband in 4-fold valleys. There exists a maximum value for the effective subband mobilities at low temperatures, which is attributed to the increase of thermally activated electrons from the ionized donors in the impurity band. The experimental results indicate that the effective subband mobility is temperature-dependent on the electron interactions by thermal activation, impurity scattering, and intersubband scattering.
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