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

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.

Keywords

Dynes density of states, Single-electron tunneling, Superconductivity

DOI

10.1103/PhysRevLett.105.026803

Citation

Pekola, J P, Maisi, V, Kafanov, S, Chekurov, N, Kemppinen, A, Pashkin, Y A, Saira, O-P, Möttönen, M & Tsai, J S 2010, ' Environment-assisted tunneling as an origin of the Dynes density of states ', Physical Review Letters, vol. 105, no. 2, 026803, pp. 1-4 . https://doi.org/10.1103/PhysRevLett.105.026803

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-201805222405

Collections

[article-cris] Perustieteiden korkeakoulu / SCI

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