Enhancement of shot noise due to the fluctuation of Coulomb interaction

  title={Enhancement of shot noise due to the fluctuation of Coulomb interaction},
  author={Duo-hui Li and Lei Zhang and Fuming Xu and Jian Wang},
  journal={Physical Review B},
We have developed a theoretical formalism to investigate the contribution of fluctuation of Coulomb interaction to the shot noise based on Keldysh non-equilibrium Green's function method. We have applied our theory to study the behavior of dc shot noise of atomic junctions using the method of nonequilibrium Green's function combined with the density functional theory (NEGF-DFT). In particular, for atomic carbon wire consisting 4 carbon atoms in contact with two Al(100) electrodes, first… 
Photon and phonon-assisted shot noise in a molecular quantum-dot-ferromagnetic system in the Coulomb blockade regime
The dynamic shot noise in a molecular quantum dot connected to two non-collinear ferromagnetic terminals under the perturbation of ac fields has been investigated by the nonequilibrium Green’s
Dynamic shot noise in a quantum dot coupled with Majorana fermions under the perturbation of microwave fields
Abstract The dynamic properties of a quantum dot (QD) coupled with Majorana fermions under the perturbation of microwave fields (MWFs) have been investigated through the nonequilibrium Green’s
Quantum Noise of Current in a 1,4-Benzenedithiol Single-Molecule Junction: First-Principle Calculations
Shot noise refers to the autocorrelation of current related to the quantum statistics of discrete electrons. The study of shot noise can provide a deep understanding of the quantum fluctuation of
Shot noise of charge current in a quantum dot responded by rotating and oscillating magnetic fields
We have investigated the shot noise and Fano factor of the dynamic spin-polarized quantum dot under the perturbations of a rotating magnetic field (RMF), and an oscillating magnetic field (OMF) by
Dynamic spin-flip shot noise of mesoscopic transport through a toroidal carbon nanotube
The shot noise in a toroidal carbon nanotube (TCN) interferometer under the perturbation of a rotating magnetic field (RMF) has been investigated. A general shot noise formula has been derived by
Numerical simulation of current noise caused by potential fluctuation in nanowire FET with an oxide trap
We present a theoretical study on the temporal current fluctuation in nanowire FET caused by the presence of a single gate oxide trap through the Coulomb interaction. Our calculations based on the
Current Fluctuations in a Semiconductor Quantum Dot with Large Energy Spacing
We report on the measurements of the current noise properties of electron tunneling through a split-gate GaAs quantum dot with large energy level spacing and a small number of electrons. Shot noise


Suppression of non-Poissonian shot noise by Coulomb correlations in ballistic conductors
We investigate the current injection into a ballistic conductor under the space-charge limited regime, when the distribution function of injected carriers is an arbitrary function of energy Fc(«).
Shot noise in nanoscale conductors from first principles
We describe a field-theoretic approach to calculate quantum shot noise in nanoscale conductors from first principles. Our starting point is the second-quantization field operator to calculate shot
Shot noise enhancement in resonant-tunneling structures in a magnetic field
We have observed that the shot noise of the tunnel current, {ital I}, in a GaSb-AlSb-InAs-AlSb-GaSb double-barrier structure under a magnetic field can exceed 2qI. The measurements were done at T=4 K
Transition from sub-Poissonian to super-Poissonian shot noise in resonant quantum wells
We investigate the transition from sub-Poissonian to super-Poissonian values of the zero-temperature shot noise power of a resonant double barrier of macroscopic cross-section. This transition occurs
We show that shot noise in a resonant tunneling diode biased in the negative differential resistance regions of the I-V characteristic is enhanced with respect to ``full'' shot noise. We provide
Noise of a quantum-dot system in the cotunneling regime
We study the noise of the cotunneling current through one or several tunnel-coupled quantum dots in the Coulomb blockade regime. The various regimes of weak and strong, elastic and inelastic
Transport and noise in resonant tunneling diode using self-consistent Green's function calculation
The fully self-consistent nonequilibrium Green’s function approach to quantum transport is developed to investigate one-dimensional nanoscale devices. Numerical calculations performed for resonant
Ab initio modeling of quantum transport properties of molecular electronic devices
We report on a self-consistent ab initio technique for modeling quantum transport properties of atomic and molecular scale nanoelectronic devices under external bias potentials. The technique is
Sub-Poissonian shot noise in nondegenerate diffusive conductors
A theory is presented for the universal reduction of shot noise by Coulomb repulsion, which was observed in computer simulations of a disordered non-degenerate electron gas by Gonzalez et al.