Nonlinear hydrodynamics and tilt modulus of flux-line liquids

Citation
P. Benetatos et Mc. Marchetti, Nonlinear hydrodynamics and tilt modulus of flux-line liquids, PHYS REV B, 59(9), 1999, pp. 6499-6516
Citations number
45
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
59
Issue
9
Year of publication
1999
Pages
6499 - 6516
Database
ISI
SICI code
0163-1829(19990301)59:9<6499:NHATMO>2.0.ZU;2-Y
Abstract
In this paper we use non-Gaussian hydrodynamics to study the magnetic respo nse of a flux-line liquid in the mixed state of a type-II superconductor. B oth the derivation of our model, which goes beyond conventional Gaussian fl ux liquid hydrodynamics, and its relationship to other approaches used in t he literature are discussed. We focus on the response to a transverse tilti ng field which is controlled by the tilt modulus c(44) of the Aux array. We show that interaction effects can enhance c(44) even in infinitely thick c lean materials. This enhancement can be interpreted as the appearance of a disentangled flux-liquid fraction. In contrast to earlier work, our theory incorporates the nonlocality of the intervortex interaction in the field di rection. This nonlocality is crucial for obtaining a nonvanishing renormali zation of the tilt modulus in the thermodynamic limit of thick samples. [S0 163-1829(99)00909-1].