Superinsulator and quantum synchronization

Valerii M. Vinokur (), Tatyana I. Baturina, Mikhail V. Fistul, Aleksey Yu. Mironov, Mikhail R. Baklanov and Christoph Strunk
Additional contact information
Valerii M. Vinokur: Argonne National Laboratory, Argonne, Illinois 60439, USA
Tatyana I. Baturina: Argonne National Laboratory, Argonne, Illinois 60439, USA
Mikhail V. Fistul: Theoretische Physik III, Ruhr-Universität Bochum, D-44801 Bochum, Germany
Aleksey Yu. Mironov: Institute of Semiconductor Physics, 630090, Novosibirsk, Russia
Mikhail R. Baklanov: IMEC, Kapeldreef 75, B-3001 Leuven, Belgium
Christoph Strunk: Institut für experimentelle und angewandte Physik, Universität Regensburg

Nature, 2008, vol. 452, issue 7187, 613-615

Abstract: Better than insulating The introduction of disorder into thin superconducting films induces a droplet-like electronic texture, with superconducting islands immersed in a normal matrix. By fine-tuning this disorder, the system can be transformed from superconductor to insulator. A paper in this issue presents experimental evidence for the involvement of a previously uncharacterized 'superinsulating' state of matter in this process, a 'mirror image' equivalent of a superconductor with infinite resistance. During the transition from superconductor to insulator, a distinct conductivity state is formed, a Cooper-pair insulator, with thermally activated conductivity. Experiments in titanium nitride films show that at a certain finite temperature, a Cooper-pair insulator becomes a superinsulator, a state resembling superconductivity in that it is destroyed by a sufficiently strong critical magnetic field, and breaks down at some critical voltage.

Date: 2008
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DOI: 10.1038/nature06837

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