2003/02/12 by Egor Babaev, Babaev, Egor
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con #hep-th
paper · pdf · doi:10.48550/arxiv.cond-mat/0302218
v3: A reference to cond-mat/0411681 for significantly extended and quantitative discussion of these question is added
arxiv created 2004/11/26 · arxiv updated 2009/11/30
We show that in two-gap Ginzburg-Landau model there is a wide range of parameters where the behaviour of the superconductor in external field can not be classified nor as type-I nor as type-II. In this regime the superconductor features a nonmonotonic interaction between vortices (which is attractive at a certain large length scale and repulsive at a shorter length scale). This results in a first order transition into an inhomogeneous state of a mixture of vortex clusters where one of the order parameters is suppressed and domains of two-gap Meissner state.