scholarly journals Nonequilibrium distribution functions of nucleons in relativistic nucleus-nucleus collisions

2013 ◽  
Vol 16 (1) ◽  
pp. 13201 ◽  
Author(s):  
Anchishkin ◽  
Naboka ◽  
Cleymans
Keyword(s):  
Distribution Functions ◽  
Relativistic Nucleus ◽  
Nonequilibrium Distribution

scholarly journals Simulation of Hydrogenated Amorphous Silicon: Temperature Dependence of Nonequilibrium Distribution Functions for Trap States

2021 ◽  
Author(s):  
Azuma Suzuki
Keyword(s):  
Temperature Dependence ◽  
Amorphous Silicon ◽  
Hydrogenated Amorphous Silicon ◽  
Negative Temperature ◽  
Distribution Functions ◽  
Trap States ◽  
Nonequilibrium Distribution ◽  
Increasing Temperature ◽  
P Type ◽  
Hydrogenated Amorphous

Abstract The nonequilibrium distribution functions (NDF) for the trap states in the mobility-gap under photo illumination and zero bias voltage are derived by the constructed self-consistent drift-diffusion simulator consisted of the Poisson equation and current continuity equations for hydrogenated amorphous silicon (a-Si:H). As for the temperature dependence of the NDF, we find that the values of the NDF decrease with increasing temperature (the negative temperature dependence) in the energy region near the conduction band for p-type a-Si:H. That is the reverse of the temperature dependence of the equilibrium distribution functions (EDF) for the trap states in the mobility-gap. Furthermore, we show that the new physical characteristic is applicable to the explanation of the temperature characteristic of the photoconductivity caused by the electron hopping in the conduction band tail for a-Si:H. The photoconductivity of a-Si:H decreases with increasing temperature, which is called the thermal quenching (TQ). We show that the TQ observed in a low temperature around 200K for p-type a-Si:H can be explained by the electron hopping model with the p-type NDF having the negative temperature dependence.

Fluctuation Expressions for Nonequilibrium Distribution Functions in Adiabatic Flows

1980 ◽  
Vol 45 (2) ◽  
pp. 124-125 ◽  
Author(s):  
Denis J. Evans ◽  
William G. Hoover ◽  
Anthony J. C. Ladd
Keyword(s):  
Distribution Functions ◽  
Nonequilibrium Distribution

EFFECT OF THE NONEQUILIBRIUM DISTRIBUTION FUNCTION ON THE ENERGY LOSS RATE OF HOT ELECTRONS IN A SEMICONDUCTOR

1995 ◽  
Vol 09 (08) ◽  
pp. 991-1000
Author(s):  
D.Y. XING ◽  
J. YANG ◽  
C.S. TING
Keyword(s):  
Energy Loss ◽  
Loss Rate ◽  
Random Phase ◽  
Distribution Functions ◽  
Hot Electrons ◽  
Acoustic Phonons ◽  
Nonequilibrium Distribution ◽  
Energy Loss Rate ◽  
Electron Phonon Interaction ◽  
Anharmonic Interaction

The closed time path Green’s function method is used to derive the nonequilibrium distribution functions of acoustic phonons and excitations of hot electrons, renormalized by the electron-phonon interaction in the random phase approximation, and to calculate the power dissipation of hot electrons. It is shown that the energy loss channel of hot electrons would vanish unless a relaxation rate corresponding to the decay of one acoustic phonon into two or more bare acoustic phonons via the anharmonic interaction is explicitly included in the phonon propagator. The effect due to the anharmonic interaction on the energy loss rate of hot electrons has also been studied.

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