New quantum phases in a one-dimensional Josephson array

Details New quantum phases in a one-dimensional Josephson array New quantum phases in a one-dimensional Josephson array

1997-05-16

arxiv.org/abs/cond-mat/9705169v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, including 1 eps figure

Scientific paper

10.1103/PhysRevLett.79.3736

We examine the phase diagram of an ordered one-dimensional Josephson array of small grains. The average grain charge in such a system can be tuned by means of gate voltage. At small grain-to-grain conductance, this system is strongly correlated because of the charge discreteness constraint (Coulomb blockade). At the gate voltages in the vicinity of the charge degeneracy points, we find new phases equivalent to a commensurate charge density wave and to a repulsive Luttinger liquid. The existence of these phases can be probed through a special dependence of the Josephson current on the gate voltage.

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