The Integrated Density of States for 1D Nanostructures at Zero Bias   Limit
  By methods of quasiclassical asymptotics the behaviour of the integrated density of states for 1D periodic nanostructures at the zero bias limit is studied. It is shown that the density of states at the zero bias limit has no regular limit while the integrated density of states has. The rigorous proof of this phenomenon given in the paper is based on a novel approach for the quasiclassical asymptotics on the spectrum of the Stark-Wannier operators. A connection of this phenomenon with the zero bias limits of the current through the nanostructures and their conductivity is briefly discussed. 
L.A.Dmitrieva