Magnetoresistance of a layered high-Tc superconductor below the Berezinskii-Kosterlitz-Thouless transition

S. N. Artemenko, I. G. Gorlova, Yu I. Latyshev

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The mechanism of the resistivity of a weakly coupled layered supecocoductor below the Berezinskii-Kosterlitz-Thouless (BKT)_ transition temperature TBKT in a magnetic field perpendicular to the layers is studied experimentally and theoretically. The resistance of Bi2Sr2CaCu2Ox single crystals at temperatures 70-90 K in a magnetic field H< kOe was measured. At T < TBKT in a field H larger than 10-30 Oe the resistance is characterized by the thermoactivated behaviour down to some characteristic temperature T*(H), below which power-law I-V curves V∝IaH(T)+1 were observed. We account for these results by the creation of 2D-vortices due to the breaking of Abrikosov vortex lines by thermal fluctuations and transport current. Calculated dependences of the power index aH on the temperature and magnetic field agree with the experimental ones. The observed T*(H) dependence is described by the condition that the mean thermal fluctuations of the positions of the 2D-vortices forming flux lines are of the order of a mean distance between flux lines.

Original languageEnglish
Pages (from-to)47-54
Number of pages8
JournalPhysica C: Superconductivity and its Applications
Volume193
Issue number1-2
DOIs
Publication statusPublished - 1 Apr 1992

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Magnetoresistance
Superconducting materials
Vortex flow
vortices
Magnetic fields
magnetic fields
Fluxes
Superconducting transition temperature
Temperature distribution
temperature distribution
transition temperature
Single crystals
Temperature
electrical resistivity
temperature
single crystals
curves
Hot Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Magnetoresistance of a layered high-Tc superconductor below the Berezinskii-Kosterlitz-Thouless transition. / Artemenko, S. N.; Gorlova, I. G.; Latyshev, Yu I.

In: Physica C: Superconductivity and its Applications, Vol. 193, No. 1-2, 01.04.1992, p. 47-54.

Research output: Contribution to journalArticle

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