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A unified scattering theory model for current noise in nanoscale devices

Tang Dong-He Du Lei Wang Ting-Lan Chen Hua Jia Xiao-Fei

A unified scattering theory model for current noise in nanoscale devices

Tang Dong-He, Du Lei, Wang Ting-Lan, Chen Hua, Jia Xiao-Fei
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  • Received Date:  12 November 2010
  • Accepted Date:  24 December 2010
  • Published Online:  15 September 2011

A unified scattering theory model for current noise in nanoscale devices

  • 1. School of Technical Physics, Xidian University, Xi’an 710071, China

Abstract: In the study of the noise characteristics of devices by traditional scattering theory,the incoherent transport and the effect of Coulomb interaction on shot noise are not taken into account, which may not be ignored in real nanoscale devices. Based on the equivalent contact model of the scattering region, we derive a unified scattering theory model for current noise, including the effects mentioned above. Our model covers the whole range of transport regime from coherent transport to incoherent transport. Our model also includes the effects of Pauli exclusion and Coulomb interaction on shot noise. Then, a numerical simulation approach is presented for our model. The approach coincides with the equivalent contact model in the property of the scattering region.

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