Influence Of Charge Fluctuations Research Articles

Dusty plasma as a unique object of plasma physics

The self-consistency and basic openness of dusty plasma, charge fluctuations, high dissipation and other features of dusty plasma system lead to the appearance of a number of unusual and unique properties of dusty plasma. “Anomalous” heating of dusty particles, anisotropy of temperatures and other features, parametric resonance, charge fluctuations and interaction potential are among these unique properties. Study is based on analytical approach and numerical simulation. Mechanisms of “anomalous” heating and energy transfer are proposed. Influence of charge fluctuations on the system properties is discussed. The self-consistent, many-particle, fluctuation and anisotropic interparticle interaction potential is studied for a significant range of gas temperature. These properties are interconnected and necessary for a full description of dusty plasmas physics.

Fluctuation model of the capacitance-voltage characteristic of MDS structure

The capacitance-voltage (C-V) characteristic of a metal-dielectric-semiconductor (MDS) structure has been theoretically studied with allowance for statistical fluctuations of a built-in charge in the dielectric. The influence of charge fluctuations on the energy spectrum of the density of surface states and other parameters of MDS structures is considered. It is shown that, in the case of using the conventional capacitive methods of determination of the density of surface states, the presence of charge fluctuations can lead to both overstated (in the regimes of enrichment and inversion) and understated (in the case of depletion) values. In the latter case, the error can be manifested by a negative density of states. Allowance for the built-in charge fluctuations is also necessary for increasing the accuracy of determination of some other MDS structure parameters by the capacitive techniques.

Influence of charge fluctuations on the critical behavior of electrolyte solutions.

The effective Hamiltonian of electrolyte solution near its critical point is constructed. The vapor-liquid critical point is investigated in detail. The strong dependence of the Landau-Ginsburg number on the concentration of electrolyte is demonstrated. It is shown that the charge fluctuations in electrolytes essentially suppress the fluctuation of the order parameter and broaden the region of classical behavior.