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Measurement and analysis of telegraph noise in the acoustoelectric current of shallow-etched quantum point device

Indian Journal of Physics, ISSN: 0974-9845, Vol: 94, Issue: 11, Page: 1759-1765
2020
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Article Description

We report on measurements and analysis of telegraph noise of acoustoelectric current induced the surface acoustic waves-based single-electron-transport devices at 1.7 K. Trapping and detrapping electrons in the defect are considered as the physical origin of random telegraph noise. A theoretical model is designed by regarding the impurity potential as the coulomb potential of point charge. And the transitions of different metastable states in the course of measuring current could be well explained by this simplified model. Furthermore, our experimental data indicate that the current noises gradually decrease and finally vanish with the increase of radio frequency (RF) power. Therefore, the RF power in the interdigital transducer could well modulate the amplitude of telegraph noise.

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