• Article  

      Bound states in a nonlinear Kronig-Penney model 

      Theodorakis, Stavros; Leontidis, Epameinondas (1997)
      We study the bound states of a Kronig Penney potential for a nonlinear one-dimensional Schrödinger equation. This potential consists of a large, but not necessarily infinite, number of equidistant δ-function wells. We show ...
    • Article  

      Magnetic-field inversion in vortices in multilayers 

      Theodorakis, Stavros; Leontidis, Epameinondas (1997)
      We present a description of very dense vortex lattices in highly anisotropic multilayers, for high fields parallel to the layers. We show that a magnetic-field inversion can occur away from the center of a vortex, provided ...
    • Article  

      Speed selection mechanism for propagating fronts in reaction-diffusion systems with multiple fields 

      Theodorakis, Stavros; Leontidis, Epameinondas (2002)
      We introduce a speed selection mechanism for front propagation in reaction-diffusion systems with multiple fields. This mechanism applies to pulled and pushed fronts alike, and operates by restricting the fields to large ...