Abstract
The conductance of linear arrays of two and three normal-metal small tunnel junctions is studied for bias voltages V below the Coloumb-blockade threshold. At low temperature, we find evidence for macroscopic quantum tunneling of the electric charge (q-MQT) through the Coulomb energy barrier. For double junctions the tunneling rate scales as V3, and approximately as the product of the junction conductances, as predicted by the theory of inelastic q-MQT.
| Original language | English |
|---|---|
| Pages (from-to) | 3037-3040 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 65 |
| Issue number | 24 |
| DOIs | |
| State | Published - 1990 |
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