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Environment-Assisted Tunneling as an Origin of the Dynes Density of States

Research output: Contribution to journalJournal articlepeer-review

Article number026803
<mark>Journal publication date</mark>6/07/2010
<mark>Journal</mark>Physical review letters
Issue number2
Number of pages4
Pages (from-to)-
Publication StatusPublished
<mark>Original language</mark>English


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.