Correlation energy of a two-dimensional electron gas from static and dynamic exchange-correlation kernels

Details Correlation energy of a two-dimensional electron gas from static and dynamic exchange-correlation kernels Correlation energy of a two-dimensional electron gas from static and dynamic exchange-correlation kernels

2003-07-17

arxiv.org/abs/cond-mat/0307416v1

Phys. Rev. B 68, 235116 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 Pages, 4 Figures

Scientific paper

10.1103/PhysRevB.68.235116

We calculate the correlation energy of a two-dimensional homogeneous electron gas using several available approximations for the exchange-correlation kernel $f_{\rm xc}(q,\omega)$ entering the linear dielectric response of the system. As in the previous work of Lein {\it et al.} [Phys. Rev. B {\bf 67}, 13431 (2000)] on the three-dimensional electron gas, we give attention to the relative roles of the wave number and frequency dependence of the kernel and analyze the correlation energy in terms of contributions from the $(q, i\omega)$ plane. We find that consistency of the kernel with the electron-pair distribution function is important and in this case the nonlocality of the kernel in time is of minor importance, as far as the correlation energy is concerned. We also show that, and explain why, the popular Adiabatic Local Density Approximation performs much better in the two-dimensional case than in the three-dimensional one.

Affiliated with

Also associated with

No associations

Rating

Correlation energy of a two-dimensional electron gas from static and dynamic exchange-correlation kernels does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Correlation energy of a two-dimensional electron gas from static and dynamic exchange-correlation kernels, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Correlation energy of a two-dimensional electron gas from static and dynamic exchange-correlation kernels will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-151683