Environment-assisted tunneling as an origin of the dynes density of states

J.P. Pekola, V.F. Maisi, S. Kafanov, N. Chekurov, A. Kemppinen, Y.A. Pashkin, O-P. Saira, M. Möttönen, J.S. Tsai

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Abstract

We show that the effect of a high-temperature environment in current transport through a normal metal–insulator–superconductor tunnel junction can be described by an effective density of states in the superconductor. In the limit of a resistive low-Ohmic environment, this density of states reduces into the well-known Dynes form. Our theoretical result is supported by experiments in engineered environments. We apply our findings to improve the performance of a single-electron turnstile, a potential candidate for a metrological current source.
Original languageEnglish
Article number026803
JournalPhysical Review Letters
Volume105
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

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high temperature environments
tunnel junctions
electrons

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Pekola, J. P., Maisi, V. F., Kafanov, S., Chekurov, N., Kemppinen, A., Pashkin, Y. A., ... Tsai, J. S. (2010). Environment-assisted tunneling as an origin of the dynes density of states. Physical Review Letters, 105, [026803]. https://doi.org/10.1103/PhysRevLett.105.026803
Pekola, J.P. ; Maisi, V.F. ; Kafanov, S. ; Chekurov, N. ; Kemppinen, A. ; Pashkin, Y.A. ; Saira, O-P. ; Möttönen, M. ; Tsai, J.S. / Environment-assisted tunneling as an origin of the dynes density of states. In: Physical Review Letters. 2010 ; Vol. 105.
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Pekola, JP, Maisi, VF, Kafanov, S, Chekurov, N, Kemppinen, A, Pashkin, YA, Saira, O-P, Möttönen, M & Tsai, JS 2010, 'Environment-assisted tunneling as an origin of the dynes density of states', Physical Review Letters, vol. 105, 026803. https://doi.org/10.1103/PhysRevLett.105.026803

Environment-assisted tunneling as an origin of the dynes density of states. / Pekola, J.P.; Maisi, V.F.; Kafanov, S.; Chekurov, N.; Kemppinen, A.; Pashkin, Y.A.; Saira, O-P.; Möttönen, M.; Tsai, J.S.

In: Physical Review Letters, Vol. 105, 026803, 2010.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Pekola, J.P.

AU - Maisi, V.F.

AU - Kafanov, S.

AU - Chekurov, N.

AU - Kemppinen, A.

AU - Pashkin, Y.A.

AU - Saira, O-P.

AU - Möttönen, M.

AU - Tsai, J.S.

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AB - We show that the effect of a high-temperature environment in current transport through a normal metal–insulator–superconductor tunnel junction can be described by an effective density of states in the superconductor. In the limit of a resistive low-Ohmic environment, this density of states reduces into the well-known Dynes form. Our theoretical result is supported by experiments in engineered environments. We apply our findings to improve the performance of a single-electron turnstile, a potential candidate for a metrological current source.

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DO - 10.1103/PhysRevLett.105.026803

M3 - Article

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JF - Physical Review Letters

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Pekola JP, Maisi VF, Kafanov S, Chekurov N, Kemppinen A, Pashkin YA et al. Environment-assisted tunneling as an origin of the dynes density of states. Physical Review Letters. 2010;105. 026803. https://doi.org/10.1103/PhysRevLett.105.026803