2010/04/30 by Ningning Hao, Ping Zhang, Jian Li +2
Chemistry · Physics and Astronomy · #Bilayer #Charge (physics) #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Electron #Exciton #Lattice (music) #Magnetic field #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Superconductivity #Thermodynamics #Vortex #Zero (linguistics) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.82.165317
4.6 pages, 3 figures
arxiv created 2010/04/30 · openalex publication_date 2010/10/13 · arxiv updated 2015/05/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the exciton condensate (EC) in a bilayer two-dimensional electron gas adjacent to a type-II superconductor thin film with an array of pinned vortex lattices. By applying continuum low-energy theory and carrying numerical simulations of lattice model within mean-field approximation, we find that if the order parameter of EC has a vortex profile, there are exact zero modes and associated rational fractional charge for zero pseudospin potential (\ensuremathμ) and average chemical potential (h): \ensuremathμ=0 and h=0; while for \ensuremathμ\ensuremath≠0 and h=0, intervalley coupling splits the zero-energy levels, and the system exhibits irrational fractional axial charge.