A SIMPLE AND ANALYTICAL STRUCTURE FACTOR FOR THE HARD-DISC FLUID

1996 ◽  
Vol 10 (09) ◽  
pp. 393-400 ◽  
Author(s):  
NELSON STUDART ◽  
HAMILTON V. DA SILVEIRA ◽  
UMBELINO DE FREITAS

We present an analytical expression for the static structure factor of hard-disc fluids by using the density–density response function in the mean-field-type approximation in which the effective potential between the particles is written in terms of the pair correlation function as proposed by Singwi, Tosi, Land and Sjölander. The structure factor exhibits the main features of the hard-disc system as compared with other theories and computer simulations at low and intermediate values of the packing fraction.

2016 ◽  
Vol 30 (30) ◽  
pp. 1650218
Author(s):  
Paulo César Miranda Machado ◽  
Francisco Aparecido Pinto Osório ◽  
Antônio Newton Borges

In this work, the collective excitation spectra of quasi-one-dimensional plasmon in a rectangular GaAs quantum wire is investigated. Our calculations are performed within the Singwi, Tosi, Land and Sjölander (STLS) self-consistent theory taking into account the plasmon–longitudinal optical (LO) phonon coupling effects. We have employed a three subband model with only the first subband occupied by electrons and we have considered intra-subband and inter-subband transitions. We show that the polaronic effects cause the appearance of dips and oscillations in the static structure factor dispersion relation, which are directly related with the oscillator strength transfer between the collective excitation energy branches. We have also observed oscillations in the pair-correlation function that are characteristic of inter-subband transitions and it denotes partial localization of the particle.


2000 ◽  
Vol 276-278 ◽  
pp. 369-370 ◽  
Author(s):  
G. Meier ◽  
U. Pawelzik ◽  
W. Schweika ◽  
W. Kockelmann

2014 ◽  
Vol 21 (7) ◽  
pp. 073704 ◽  
Author(s):  
A. E. Davletov ◽  
L. T. Yerimbetova ◽  
Ye. S. Mukhametkarimov ◽  
A. K. Ospanova

Sign in / Sign up

Export Citation Format

Share Document