2005/04/30 by Yariv Kafri, Y Kafri, David R. Nelson +3
Materials Science · Physics and Astronomy · #Curse of dimensionality #Exponent #Flux (metallurgy) #Flux pinning #Iron-based superconductors research #Line (geometry) #Magnetic flux #Physics of Superconductivity and Magnetism #Plane (geometry) #Quantum and electron transport phenomena #Superconductivity #cond-mat.dis-nn #cond-mat.stat-mech #cond-mat.supr-con
paper · pdf · doi:10.1209/epl/i2005-10390-9
published as Europhysics Letters 73, 253 (2006) · 5 pages, 4 figures
arxiv created 2005/06/29 · openalex publication_date 2005/12/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
With magnetic force microscopy in mind, we study the unbinding transition of individual flux lines from extended defects like columnar pins and twin planes in type-II superconductors. In the presence of point disorder, the transition is universal with an exponent which depends only on the dimensionality of the extended defect. We also consider the unbinding transition of a single vortex line from a twin plane occupied by other vortices. We show that the critical properties of this transition depend strongly on the Luttinger liquid parameter which describes the long-distance physics of the two-dimensional flux line array.