Measurement of the energy dependence of phase relaxation by single   electron tunneling
  Single electron tunneling through a single impurity level is used to probe the fluctuations of the local density of states in the emitter. The energy dependence of quasi-particle relaxation in the emitter can be extracted from the damping of the fluctuations of the local density of states (LDOS). At larger magnetic fields Zeeman splitting is observed. 
P. K\"onig, J. K\"onemann, T. Schmidt, E. McCann, V. I. Fal'ko, R. J.   Haug