Problem
1. Calculate the density of states (DUKE) for the electronic subband of a one-dimensional conductor. Sketch the density of states as function of the electron energy E for a sequence of subbands as they exist in a conducting wire.
2. Which scattering processes are possible in electron transport if only a single subband is occupied? What is different if a second subband is occupied so that the Fermi-level intersects two subbands?