ac Dynamics of a Pinned Flux-Line Lattice

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ac Dynamics of a Pinned Flux-Line Lattice

The surface impedance of 2H-NbSe2 in the mixed state was measured over the frequency range 10–3000 MHz in fields up to 2 T. A crossover between pinned and viscous flux-line dynamics is observed at a pinning frequency, vp . The measured vp is compared to that predicted by a singleparticle “washboard potential” model of pinning. When the flux lattice is in an ordered state, vp is in good agreemen...

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The mechanical stability of a Aux-line lattice (FLL) having parameters appropriate for the high-T, superconductors is determined using the self-consistent phonon theory of lattice dynamics. Nearly parallel Aux lines (FL's) are assumed and FL pinning is neglected. The FLL becomes unstable when a phonon frequency goes to zero. At instability the rms vibrational amplitude diverges and the FL's can...

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We study translational correlations of the vortex center of mass positions of the Abrikosov flux-line lattice in superconducting samples of finite thickness L (along the direction of flux-lines). The Larkin correlation lengths for the center of mass mode of the flux lines in the presence of point and correlated disorder are computed, and we find that in the case of point disorder the average (i...

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ژورنال

عنوان ژورنال: Physical Review Letters

سال: 1998

ISSN: 0031-9007,1079-7114

DOI: 10.1103/physrevlett.80.381