Langevin Simulations of Two Dimensional Vortex Fluctuations: Anomalous Dynamics and a New IV-exponent
Kenneth Holmlund, Petter Minnhagen
Abstract
The dynamics of two dimensional (2D) vortex fluctuations are investigated through simulations of the 2D Coulomb gas model in which vortices are represented by soft disks with logarithmic interactions. The simulations trongly support a recent suggestion that 2D vortex fluctuations obey an intrinsic anomalous dynamics manifested in a long range 1/t-tail in the vortex correlations. A new non-linear IV-exponent a, which is different from the commonly used AHNS exponent, aAHNS and is given by a = 2aAHNS - 3, is confirmed by the simulations. The results are discussed in the context of earlier simulations, experiments and a phenomenological description.
Create a lesson
Related papers
Ginzburg Landau theory for d-wave pairing and fourfold symmetric vortex core structure
Naoki Enomoto, Masanori Ichioka, Kazushige Machida
Density of States and NMR Relaxation Rate in Anisotropic Superconductivity with Intersecting Line Nodes
Yasumasa Hasegawa
Critical State Flux Penetration and Linear Microwave Vortex Response in YBa2Cu3O7-x Films
Balam A. Willemsen, J. S. Derov, S. Sridhar
Nonlinear Response of HTSC Thin Film Microwave Resonators in an Applied DC Magnetic Field
Durga P. Choudhury, Balam A. Willemsen, John S. Derov et al.
On the origin of the irreversibility line in thin YBaCuO7 films with and without columnar defects
R. Prozorov, M. Konczykowski, B. Schmidt et al.
The Fluctuation Induced Pseudogap in the Infrared Optical Conductivity of High Temperature Superconductors
Francesca Federici, Andrei A. Varlamov