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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2004, Volume 79, Issue 7, Pages 416–420
(Mi jetpl2269)
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This article is cited in 62 scientific papers (total in 62 papers)
CONDENSED MATTER
Superconductivity on the localization threshold and magnetic-field-tuned superconductor–insulator transition in TiN films
T. I. Baturinaa, D. R. Islamova, J. Bentnerb, C. Strunkb, M. R. Baklanovc, A. Sattac a Institute of Semiconductor Physics, 630090 Novosibirsk, Russia
b Institut für experimentelle und angewandte Physik, Universität Regensburg, D-93025 Regensburg, Germany
c Independent Microelectronic Center, B-3001 Leuven, Belgium
Abstract:
Temperature- and magnetic-field dependent measurements of the resistance of ultrathin superconducting TiN films are presented. The analysis of the temperature dependence of the zero field resistance indicates an underlying insulating behavior, when the contribution of Aslamasov–Larkin fluctuations is taken into account. This demonstrates the possibility of coexistence of the superconducting and insulating phases and of a direct transition from the one to the other. The scaling behavior of magnetic field data is in accordance with a superconductor–insulator transition (SIT) driven by quantum phase fluctuations in two-dimensional superconductor. The temperature dependence of the isomagnetic resistance data on the high-field side of the SIT has been analyzed and the presence of an insulating phase is confirmed. A transition from the insulating to a metallic phase is found at high magnetic fields, where the zero-temperature asymptotic value of the resistance being equal to $h/e^2$.
Received: 11.09.2003 Revised: 25.02.2004
Citation:
T. I. Baturina, D. R. Islamov, J. Bentner, C. Strunk, M. R. Baklanov, A. Satta, “Superconductivity on the localization threshold and magnetic-field-tuned superconductor–insulator transition in TiN films”, Pis'ma v Zh. Èksper. Teoret. Fiz., 79:7 (2004), 416–420; JETP Letters, 79:7 (2004), 337–341
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