Effect of quantum noise on Coulomb blockade in normal tunnel junctions at high voltages

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2000
Major/Subject
Mcode
Degree programme
Language
en
Pages
10890-10897
Series
Physical Review B, Volume 61, Issue 16
Abstract
We have investigated the asymptotic behavior of normal tunnel junctions at voltages where even the best Ohmic environments start to look like RC transmission lines. In the experiments, this is manifested by an exceedingly slow approach to the linear behavior above the Coulomb gap. As expected on the basis of the quantum theory taking into account interaction with the environmental modes, better fits are obtained using 1/√V than 1/V dependence for the asymptote. These results agree with the horizon picture if the frequency-dependent phase velocity is employed instead of the speed of light in order to determine the extent of the surroundings seen by the junction.
Description
Keywords
tunnel junctions, quantum noise
Other note
Citation
Penttilä, J. S. & Parts, Ü. & Hakonen, Pertti J. & Paalanen, M. A. & Sonin, E. B. 2000. Effect of quantum noise on Coulomb blockade in normal tunnel junctions at high voltages. Physical Review B. Volume 61, Issue 16. 10890-10897. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.61.10890