Superconductivity on the localization threshold and magnetic-field-tuned superconductor-insulator transition in TiN films

被引：62

作者：

Baturina, TI ^{[1
]}

Islamov, DR

Bentner, J

Strunk, C

Baklanov, MR

Satta, A

机构：

[1] Russian Acad Sci, Inst Semicond Phys, Novosibirsk 630090, Russia

[2] Univ Regensburg, Inst Expt & Angew Phys, D-93025 Regensburg, Germany

[3] Independent Microelect Ctr, B-3001 Louvain, Belgium

来源：

JETP LETTERS | 2004年 / 79卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/1.1765178

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 Aslamazov-Larkin fluctuations is taken into account. This demonstrates the possibility of the 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 is equal to h/e(2). (C) 2004 MAIK "Nauka/Interperiodica".

引用

页码：337 / 341

页数：5

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