Abstract
Quantum phase slip (QPS) is the particular manifestation of quantum fluctuations of the order parameter of a current-biased quasi-1D superconductor. The QPS event(s) can be considered a dynamic equivalent of tunneling through conventional Josephson junction containing static in space and time weak link(s). At low temperatures T<<T c, the QPS effect leads to finite resistivity of narrow superconducting channels and suppresses persistent currents in tiny nanorings. Here, we demonstrate that the quantum tunneling of phase may result in Coulomb blockade: superconducting nanowire, imbedded in high-Ohmic environment, below a certain bias voltage behaves as an insulator.
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Acknowledgments
The authors would like to acknowledge D. Averin, P. Hakkonen, T. Heikkilä, L. Kuzmin, Yu. Nazarov, Yu. Pashkin, J. Pekola, A. Zaikin, and A. Zorin for valuable discussions.
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Arutyunov, K.Y., Lehtinen, J.S. & Rantala, T. The Quantum Phase Slip Phenomenon in Superconducting Nanowires with High-Impedance Environment. J Supercond Nov Magn 29, 569–572 (2016). https://doi.org/10.1007/s10948-015-3298-9
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DOI: https://doi.org/10.1007/s10948-015-3298-9