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Observation of Strong Coulomb Blockade in Resistively Isolated Tunnel Junctions

Wei Zheng·Jonathan R. Friedman·D. V. Averin·Siyuan Han·J. E. Lukens
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Abstract

We report measurements of the Coulomb-blockade current in resistively isolated (R_{Isol} >> h/e^{2}) tunnel junctions for the temperature range 60mK $We report measurements of the Coulomb-blockade current in resistively isolated ($R_{Isol}\gg h/e^{2})$ tunnel junctions for the temperature range 60mK < T < 230mK where the charging energy E_{c} is much greater than the thermal energy. A zero-bias resistance R_{0} of up to 10^{4}R_{T} (the tunnel resistance of the bare junction) is obtained. For eV << E_{c}, the I-V curves for a given R_{Isol} scale as a function of V/T, with I \propto V^{α(R_{Isol})} over a range of V. The data agree well with numerical calculations of the tunneling rate that include environmental effects.

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Wei Zheng, Jonathan R. Friedman, D. V. Averin, Siyuan Han, J. E. Lukens. 1998-06-03. Observation of Strong Coulomb Blockade in Resistively Isolated Tunnel Junctions. https://doi.org/10.1016/s0038-1098(98)00439-6

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