Pair correlation functions of coupled electron-hole quantum wire system at finite temperature

Abstract

We theoretically investigate the intra- and inter-wire pair-correlation functions of the coupled electron-hole quantum wire system at finite temperature using the Random Phase Approximation and taking into account the mass-asymmetry of the charge carriers. Numerical results are presented for a good range of temperature, linear electron (hole) number density and inter-wire spacing at fixed wire width. Our calculations reveal that even at high number density, the holes in the hole wire are more strongly coupled (due to their heavier mass) than the electrons in the electron wire. Also, the inter-wire correlations build up in a monotonous manner with increasing temperature and decreasing inter-wire separation/particle number density.