Hyperactivated Resistance in TiN Films on the Insulating Side of the Disorder-Driven Superconductor-Insulator Transition

被引：27

作者：

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

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

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

Baklanov, M. R. ^{[3
]}

Strunk, C. ^{[4
]}

机构：

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

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

[3] IMEC, B-3001 Louvain, Belgium

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

来源：

JETP LETTERS | 2008年 / 88卷 / 11期

关键词：

D O I：

10.1134/S0021364008230112

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the insulating phase that forms in a titanium nitride film in a close vicinity of the disorder-driven superconductor-insulator transition. In zero magnetic field the temperature dependence of the resistance reveals a sequence of distinct regimes upon decreasing temperature crossing over from logarithmic to activated behavior with the variable-range hopping squeezing in between. In perpendicular magnetic fields below 2 T, the thermally activated regime retains at intermediate temperatures, whereas at ultralow temperatures, the resistance increases faster than that of the thermally activated type. This indicates a change of the mechanism of the conductivity. We find that at higher magnetic fields the thermally activated behavior disappears and the magnetoresistive isotherms saturate towards the value close to quantum resistance h/e(2).

引用

页码：752 / 757

页数：6

共 37 条

[1]

Altshuler B. L., 1985, ELECT ELECT INTERACT

[2] Quantum-critical region of the disorder-driven superconductor-insulator transition [J].

Baturina, T. I. ;

Bilusic, A. ;

Mironov, A. Yu. ;

Vinokur, V. M. ;

Baklanov, M. R. ;

Strunk, C. .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2008, 468 (04) :316-321

[3] Quantum metallicity on the high-field side of the superconductor-insulator transition [J].

Baturina, T. I. ;

Strunk, C. ;

Baklanov, M. R. ;

Satta, A. .

PHYSICAL REVIEW LETTERS, 2007, 98 (12)

[4] Localized superconductivity in the quantum-critical region of the disorder-driven superconductor-insulator transition in TiN thin films [J].

Baturina, T. I. ;

Mironov, A. Yu. ;

Vinokur, V. M. ;

Baklanov, M. R. ;

Strunk, C. .

PHYSICAL REVIEW LETTERS, 2007, 99 (25)

[5] CHARGE SOLITONS AND QUANTUM FLUCTUATIONS IN 2-DIMENSIONAL ARRAYS OF SMALL JOSEPHSON-JUNCTIONS [J].

DELSING, P ;

CHEN, CD ;

HAVILAND, DB ;

HARADA, Y ;

CLAESON, T .

PHYSICAL REVIEW B, 1994, 50 (06) :3959-3971

[6] 2-DIMENSIONAL ELECTRICAL-CONDUCTIVITY IN QUENCH-CONDENSED METAL-FILMS [J].

DYNES, RC ;

GARNO, JP ;

ROWELL, JM .

PHYSICAL REVIEW LETTERS, 1978, 40 (07) :479-482

[7] Anomalous proximity effect in an inhomogeneous disordered superconductor -: art. no. 217005 [J].

Escoffier, W ;

Chapelier, C ;

Hadacek, N ;

Villégier, JC .

PHYSICAL REVIEW LETTERS, 2004, 93 (21) :217005-1

[8] CHARGE AND VORTEX DYNAMICS IN ARRAYS OF TUNNEL-JUNCTIONS [J].

FAZIO, R ;

SCHON, G .

PHYSICAL REVIEW B, 1991, 43 (07) :5307-5320

[9]

FINKELSHTEIN AM, 1987, JETP LETT+, V45, P46

[10] SUPPRESSION OF SUPERCONDUCTIVITY IN HOMOGENEOUSLY DISORDERED-SYSTEMS [J].

FINKELSTEIN, AM .

PHYSICA B, 1994, 197 (1-4) :636-648

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