Noise characteristics of degenerate electron gas in two- or three-dimensional channels at moderate/high electric fields are investigated theoreticaly at densities sufficient for the electron temperature approximation to work. Current fluctuations are sensitive to additional correlation of occupancies of one-electron states created by inter-electron (e–e) collisions in non-equilibrium. Specificity of degenerate systems lies in the fact that the most non-trivial part of correlation is intrinsically of a two-particle nature. The degeneracy effects violate the macroscopic noise–response relations valid for Boltzmann's statistics. The method is worked out for calculating the source of correlation of the electron energies as a function of the applied electric field for different electron–lattice scattering mechanisms.
Current Fluctuations in Degenerate Non-Equilibrium Systems / R. Katilius; S. Reggiani; M. Rudan. - STAMPA. - (2005), pp. 29-32. (Intervento presentato al convegno 18th International Conference on Noise and Fluctuations (ICNF 2005) tenutosi a Salamanca, Spain nel 19-23 September, 2005).
Current Fluctuations in Degenerate Non-Equilibrium Systems
REGGIANI, SUSANNA;RUDAN, MASSIMO
2005
Abstract
Noise characteristics of degenerate electron gas in two- or three-dimensional channels at moderate/high electric fields are investigated theoreticaly at densities sufficient for the electron temperature approximation to work. Current fluctuations are sensitive to additional correlation of occupancies of one-electron states created by inter-electron (e–e) collisions in non-equilibrium. Specificity of degenerate systems lies in the fact that the most non-trivial part of correlation is intrinsically of a two-particle nature. The degeneracy effects violate the macroscopic noise–response relations valid for Boltzmann's statistics. The method is worked out for calculating the source of correlation of the electron energies as a function of the applied electric field for different electron–lattice scattering mechanisms.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
