Shot-noise suppression by Fermi and Coulomb correlations in ballistic conductors

Abstract

We investigate the injection of degenerate Fermi-Dirac electrons into a multimode ballistic conductor under the space-charge limited regime. The nonequilibrium current fluctuations were found to be suppressed by both Coulomb and Fermi correlations. We show that the Fermi shot-noise suppression factor is limited below by the value 2kT/epsilon_F, where T is the temperature and epsilon_F the Fermi energy of the injected electrons. The Coulomb noise suppression factor may attain much lower values epsilon_F/2qU, because of its dependence on the applied bias U >> kT/q. The asymptotic behaviour of the overall shot-noise suppression factor in a high degenerate limit was found to be kT/qU, independently of the material parameters.

arXiv comment8 pages, 4 figures, minor changes, published version

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Cited by in corpus (6)

• Shot noise suppression in quasi one-dimensional Field Effect Transistors
• Semiclassical theory of shot noise in ballistic n+-i-n+ semiconductor strucutres: relevance of Pauli and long range Coulomb correlations
• Quantum suppression of shot noise in field emitters
• Self-consistent theory of current and voltage noise in multimode ballistic conductors
• Statistical theory of shot noise in quasi-1D Field Effect Transistors in the presence of electron-electron interaction
• Shot noise as a tool to probe an electron energy distribution