Nanopattern-stimulated superconductor-insulator transition in thin TiN films

被引：32

作者：

Baturina, T. I. ^{[1
,2
]}

Vinokur, V. M. ^{[2
]}

Mironov, A. Yu. ^{[1
]}

Chtchelkatchev, N. M. ^{[2
,3
,4
]}

Nasimov, D. A. ^{[1
]}

Latyshev, A. V. ^{[1
]}

机构：

[1] AV Rzhanov Inst Semicond Phys SB RAS, Novosibirsk 630090, Russia

[2] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[3] Russian Acad Sci, Inst High Pressure Phys, Troitsk 142190, Moscow Region, Russia

[4] Russian Acad Sci, LD Landau Theoret Phys Inst, Moscow 117940, Russia

来源：

EPL | 2011年 / 93卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

JOSEPHSON-JUNCTION ARRAYS; MAGNETIC-FIELD; RESISTIVE TRANSITION; 2-DIMENSIONAL ARRAYS; PHASE-TRANSITIONS; CRITICAL CURRENTS; WEAK LINKS; DISORDER; MAGNETORESISTANCE; OSCILLATIONS;

D O I：

10.1209/0295-5075/93/47002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the results of the comparative study of transport properties of continuous and nanoperforated TiN films, enabling us to separate the disorder and the geometry effects. Nanopatterning transforms a thin TiN film into an array of superconducting weak links and eo ipso stimulates the disorder and magnetic-field driven superconductor-to-insulator transitions, shifting both transitions to a lower degree of microscopic disorder. We observe magnetoresistance oscillations reflecting collective phase-frustration behaviour of the multiconnected superconducting weak link network in a wide range of temperatures. We find that nanopatterning enhances the role of the two-dimensional Coulomb interaction and changes the characteristic energies of the film on length scales significantly larger than the mean free path or the superconducting coherence length. Copyright (C) EPLA, 2011

引用

页数：6

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