Relaxation and edge reconstruction in integer quantum Hall systems
  The interplay between the confinement potential and electron-electron interactions causes reconstructions of Quantum Hall edges. We study the consequences of this edge reconstruction for the relaxation of hot electrons injected into integer quantum Hall edge states. In translationally invariant edges, the relaxation of hot electrons is governed by three-body collisions which are sensitive to the electron dispersion and thus to reconstruction effects. We show that the relaxation rates are significantly altered in different reconstruction scenarios. 
Torsten Karzig, Alex Levchenko, Leonid I. Glazman, Felix von Oppen
cond-mat.mes-hall