Thermally activated conductance in arrays of small Josephson junctions
| Autor: | J. Zimmer, Roland Schäfer, Alexey V. Ustinov, Michael Marthaler, Nicolas Vogt, Alexander Lukashenko, Alexander Shnirman, Hannes Rotzinger, Sergey Syzranov, A. Fiebig |
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| Rok vydání: | 2013 |
| Předmět: |
Josephson effect
Physics Superconductivity Condensed matter physics Condensed Matter - Superconductivity FOS: Physical sciences Order (ring theory) Conductance Coulomb blockade Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Superconductivity (cond-mat.supr-con) SQUID law Condensed Matter::Superconductivity Cooper pair Energy (signal processing) |
| Zdroj: | Physical Review B. 88 |
| ISSN: | 1550-235X 1098-0121 |
| DOI: | 10.1103/physrevb.88.144506 |
| Popis: | We present measurements of the temperature-dependent conductance for series arrays of small-capacitance SQUIDs. At low bias voltages, the arrays exhibit a strong Coulomb blockade, which we study in detail as a function of temperature and Josephson energy $E_J$. We find that the zero-bias conductance is well described by thermally activated charge transport with the activation energy on the order of $\Lambda E_C$, where $\Lambda$ is the charge screening length in the array and $E_C$ is the charging energy of a single SQUID. Comment: 6 pages, 3 figures |
| Databáze: | OpenAIRE |
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