Charge-Sensitivity-Oriented Analysis of Quantum Point Contact Sensor Based on the Landauer's Formula

Hua Chen; Liang He; Ting Lan Wang

doi:10.4028/www.scientific.net/AMM.329.387

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 329Charge-Sensitivity-Oriented Analysis of Quantum...

Charge-Sensitivity-Oriented Analysis of Quantum Point Contact Sensor Based on the Landauer's Formula

Abstract:

The effect of temperature is introduced to Büttiker transmission coefficient formula, and combined with current model and noise model in Landauers picture, temperature-dependent conductance and noise could be estimated. The expression of intrinsic sensitivity is approved, which is proportional to the square root of noise, and capacitance electrostatically coupled with environment, and inversely proportional to differential transconductance. In terms of the capacitance range of QPC, the intrinsic sensitivity is estimated, and it is clear that the present QPC charge sensor still has space to improve sensitivity.

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Periodical:

Applied Mechanics and Materials (Volume 329)

Pages:

387-391

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.329.387

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Online since:

June 2013

Authors:

Hua Chen, Liang He, Ting Lan Wang

Keywords:

Charge Sensitivity, Conductance Quantization, Noise, Quantum Point Contact

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