Open AccessCoulomb drag rate in a coupled electron-electron quantum wire system
Author(s) -
Vishal Verma,
Devi Puttar,
Vinayak Garg,
R. K. Moudgil
Publication year - 2022
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1221/1/012031
Subject(s) - drag , coulomb , electron , condensed matter physics , random phase approximation , physics , quantum wire , coupling (piping) , electron density , quantum , wigner crystal , range (aeronautics) , quantum mechanics , atomic physics , materials science , mechanics , metallurgy , composite material
In this paper, we calculate the Coulomb drag rate in a coupled electron-electron ( e-e ) quantum wire system over a wide range of temperature T , and some selected values of electron number densityandinter-wire spacing. The intra- and inter-wire exchange-correlations are treated within the self-consistent mean-field approximation of Singwi et al (the so called STLS theory) suitably generalized to the coupled system at finite- T . At a fixed T , the drag rate is found to increase with decrease in inter-wire separation and/or electron number density due to increased intra- and inter-wire coupling among electrons. Further, we note that the magnitude of drag rate is more in the STLS theory as compared to the random-phase approximation (RPA), and the difference consistently increases with decrease in inter-wire spacing.