Shot noise suppression in multimode ballistic Fermi conductors

Abstract

We have derived a general formula describing current noise in multimode ballistic channels connecting source and drain electrodes with Fermi electron gas. In particular (at $eV\gg k_{B}T$), the expression describes the nonequilibrium ''shot'' noise, which may be suppressed by both Fermi correlations and space charge screening. The general formula has been applied to an approximate model of a 2D nanoscale, ballistic MOSFET. At large negative gate voltages, when the density of electrons in the channel is small, shot noise spectral density $S_I(0)$ approaches the Schottky value $2eI$, where $I$ is the average current. However, at positive gate voltages, when the maximum potential energy in the channel is below the Fermi level of the electron source, the noise can be at least an order of magnitude smaller than the Schottky value, mostly due to Fermi effects.

4 pages

References in corpus (6)

• Quantum Transport in Semiconductor Nanostructures
• Quantum suppression of shot noise in atom-size metallic contacts
• Nanoscale Field-Effect Transistors: An Ultimate Size Analysis
• Effect of long-range Coulomb interaction on shot-noise suppression in ballistic transport
• Electron-number statistics and shot-noise suppression by Coulomb correlation in nondegenerate ballistic transport
• Noise properties and ac conductance of mesoscopic diffusive conductors with screening

Cited by in corpus (11)

• Shot Noise in Mesoscopic Conductors
• Shot noise suppression at 1D hopping
• Shot Noise Suppression at 2D Hopping
• Shot-noise suppression by Fermi and Coulomb correlations in ballistic conductors
• Self-consistent theory of shot noise in nondegenerate ballistic conductors
• 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
• Suppression of non-Poissonian shot noise by Coulomb correlations in ballistic conductors
• Shot Noise in Disordered Junctions: Interaction Corrections
• Statistical theory of shot noise in quasi-1D Field Effect Transistors in the presence of electron-electron interaction
• Thermal shot noise in top-gated single carbon nanotube field effect transistors