Vortex dynamics and phase transitions in a two-dimensional array of Josephson junctions

Journal Article · Mon Mar 24 04:00:00 EST 1986 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.56.1291· OSTI ID:5951578

Leemann, C; Lerch, P; Racine, G h; Martinoli, P

The ac response of large two-dimensional arrays of proximity-effect Josephson junctions to an oscillating driving field has been studied as a function of temperature, applied transverse magnetic field, and frequency. For an integer number of flux quanta per unit cell, a peak in dissipation and a drop in superfluid density are observed near the superconducting transition of the array. These features as well as their frequency dependence provide clear evidence for the vortex-unbinding transition predicted by the Kosterlitz-Thouless theory.

• Research Organization: Institut de Physique, Universite de Neuchtel, CH-2000 Neuchtel, Switzerland
• OSTI ID: 5951578
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 56:12; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AC SYSTEMS
COPPER
DYNAMICS
ELEMENTS
ENERGY LOSSES
ENERGY SYSTEMS
FREQUENCY DEPENDENCE
JOSEPHSON JUNCTIONS
JUNCTIONS
LEAD
LOSSES
MAGNETIC FIELDS
MECHANICS
METALS
POWER SYSTEMS
PROXIMITY EFFECT
SUPERCONDUCTING JUNCTIONS
SUPERFLUIDITY
SURFACES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
VORTICES