Zero-average Bias Bidirectional Single-electron Current Generation in a Hybrid Turnstile

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2023-01
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Language
en
Pages
9
232-240
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Journal of Low Temperature Physics, Volume 210, issue 1-2
Abstract
Hybrid turnstiles have proven to generate accurate single-electron currents. The usual operation consists of applying a periodic modulation to a capacitively coupled gate electrode and requires a nonzero DC source-drain bias voltage. Under this operation, a current of the same magnitude and opposite direction can be generated by flipping the polarity of the bias. Here, we demonstrate that accurate single-electron currents can be generated under zero average bias voltage. We achieve this by applying an extra periodic modulation with twice the frequency of the gate signal and zero DC level to the source electrode. This creates a time interval, which is otherwise zero, between the crossings of tunnelling thresholds that enable single-electron tunnelling. Furthermore, we show that within this operation the current direction can be reversed by only shifting the phase of the source signal.
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Citation
Marin Suarez , M , Pashkin , Y A , Peltonen , J & Pekola , J P 2023 , ' Zero-average Bias Bidirectional Single-electron Current Generation in a Hybrid Turnstile ' , Journal of Low Temperature Physics , vol. 210 , no. 1-2 , pp. 232-240 . https://doi.org/10.1007/s10909-022-02878-7