Quantum Phase Transition in One-Dimensional Arrays of Resistively Shunted Small Josephson Junctions
Hisao Miyazaki, Yamaguchi Takahide, Akinobu Kanda, Youiti Ootuka
DOI 10.1103/PhysRevLett.89.197001 · Physical Review Letters
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Abstract
We have observed a superconductor-insulator transition in one-dimensional (1D) arrays of small Josephson junctions by changing both the resistance RS of normal metal resistors shunting each junction and the ratio of the Josephson coupling energy EJ to the charging energy EC. The phase boundary lies at RS≈RQ (RQ≡h/4e2=6.45 kΩ) when EJ/EC is smaller than about unity. We discuss the obtained phase diagram in terms of theoretical models of the dissipation-driven quantum phase transition, with particular attention to differences from 2D arrays.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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