Exchange-correlation energy of a multicomponent two-dimensional electron gas

Details Exchange-correlation energy of a multicomponent two-dimensional electron gas Exchange-correlation energy of a multicomponent two-dimensional electron gas

2003-10-03

arxiv.org/abs/cond-mat/0310059v1

Phys. Rev. B 68, 205322 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures, to be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.68.205322

We discuss the exchange-correlation energy of a multicomponent (multi-valley) two-dimensional electron gas and show that an extension of the recent parametrisation of the exchange-correlation energy by Attacalite et al (Phys. Rev. Lett. 88, 256601 (2002)) describes well also the multicomponent system. We suggest a simple mass dependence of the correlation energy and apply it to study the phase diagram of the multicomponent 2D electron (or hole) gas. The results show that even a small mass difference of the components (e.g. heavy and light holes) decreases the concentration of the lighter components already at relatively high densities.

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