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Self-consistent theory of current and voltage noise in multimode ballistic conductors
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Electron transport in a self-consistent potential along a ballistic two-terminal conductor has been investigated. We have derived general formulas which describe the nonlinear current-voltage characteristics, differential conductance, and low-frequency current and voltage noise assuming an arbitrary distribution function and correlation properties of injected electrons. The analytical results have been obtained for a wide range of biases: from equilibrium to high values beyond the linear-response regime. The particular case of a three-dimensional Fermi-Dirac injection has been analyzed. We show that the Coulomb correlations are manifested in the negative excess voltage noise, i.e., the voltage fluctuations under high-field transport conditions can be less than in equilibrium.
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BULASHENKO, Oleg and RUBÍ CAPACETI, José Miguel. Self-consistent theory of current and voltage noise in multimode ballistic conductors. Physical Review B. 2002. Vol. 66, num. 4, pags. 045310-1-045310-16. ISSN 0163-1829. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/10878