Dissipation-Driven Superconductor-Insulator Transition in a Two-Dimensional Josephson-Junction Array

A. J. Rimberg; T. R. Ho; Ç. Kurdak; John Clarke; K. L. Campman; A. C. Gossard

doi:10.1103/PhysRevLett.78.2632

Dissipation-Driven Superconductor-Insulator Transition in a Two-Dimensional Josephson-Junction Array

A. J. Rimberg, T. R. Ho, Ç. Kurdak, John Clarke, K. L. Campman, and A. C. Gossard

Phys. Rev. Lett. 78, 2632 – Published 31 March 1997

Abstract

We have fabricated a two-dimensional array of Josephson junctions within 100 nm of a two-dimensional electron gas (2DEG) in a GaAs/AlGaAs heterostructure. The screening provided by the 2DEG causes the array to show superconducting behavior despite a large junction resistance. Varying the resistance per square of the 2DEG changes the dissipation in the electrodynamic environment of the array independently of any other parameters in the system. As the resistance increases, the current-voltage characteristics of the array change from superconducting to insulating in character.

Received 26 November 1996

DOI:https://doi.org/10.1103/PhysRevLett.78.2632

Authors & Affiliations

A. J. Rimberg, T. R. Ho, Ç. Kurdak, and John Clarke

Department of Physics, University of California, Berkeley, California 94720
and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720

K. L. Campman and A. C. Gossard