Experimental investigation of hybrid single-electron turnstiles with high charging energy

A. Kemppinen; S. Kafanov; Yu A. Pashkin; J. S. Tsai; D. V. Averin; J. P. Pekola

doi:10.1063/1.3127229

Experimental investigation of hybrid single-electron turnstiles with high charging energy

A. Kemppinen
, S. Kafanov
, Yu A. Pashkin
, J. S. Tsai
, D. V. Averin
, J. P. Pekola

Physics and Astronomy

Centre for Metrology and Accreditation (MIKES)
Aalto University
RIKEN

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

We present an experimental study of hybrid turnstiles with high charging energies in comparison to the superconducting gap. The device is modeled with the sequential tunneling approximation. The backtunneling effect is shown to limit the amplitude of the gate drive and thereby the maximum pumped current of the turnstile. We compare results obtained with sine and square wave drive and show how a fast rise time can suppress errors due to leakage current. Quantized current plateaus up to 160 pA are demonstrated.

Original language	English
Article number	172108
Journal	Applied Physics Letters
Volume	94
Issue number	17
DOIs	https://doi.org/10.1063/1.3127229
State	Published - 2009

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abstract = "We present an experimental study of hybrid turnstiles with high charging energies in comparison to the superconducting gap. The device is modeled with the sequential tunneling approximation. The backtunneling effect is shown to limit the amplitude of the gate drive and thereby the maximum pumped current of the turnstile. We compare results obtained with sine and square wave drive and show how a fast rise time can suppress errors due to leakage current. Quantized current plateaus up to 160 pA are demonstrated.",

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AU - Kafanov, S.

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AU - Averin, D. V.

AU - Pekola, J. P.

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AB - We present an experimental study of hybrid turnstiles with high charging energies in comparison to the superconducting gap. The device is modeled with the sequential tunneling approximation. The backtunneling effect is shown to limit the amplitude of the gate drive and thereby the maximum pumped current of the turnstile. We compare results obtained with sine and square wave drive and show how a fast rise time can suppress errors due to leakage current. Quantized current plateaus up to 160 pA are demonstrated.

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VL - 94

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Experimental investigation of hybrid single-electron turnstiles with high charging energy

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