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

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2009
Major/Subject
Mcode
Degree programme
Language
en
Pages
172108/1-3
Series
Applied Physics Letters, Volume 94, Issue 17
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.
Description
Keywords
single-electron turnstile, high charging energy, tunneling, Andreev reflection, charged currents, superconductivity, amplifiers
Other note
Citation
Kemppinen, A. & Kafanov, S. & Pashkin, Yu. A. & Tsai, J. S. & Averin, D. V. & Pekola, Jukka. 2009. Experimental investigation of hybrid single-electron turnstiles with high charging energy. Applied Physics Letters. Volume 94, Issue 17. P. 172108/1-3. ISSN 0003-6951 (printed). DOI: 10.1063/1.3127229.