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

Abstract

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.

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

References in corpus (3)

• Electron transport through double quantum dots
• Correlation energy and spin polarization in the 2D electron gas
• Electronic States in Silicon Quantum Dots: Multivalley Artificial Atoms

Cited by in corpus (5)

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• Spin-transfer physics and the model of ferromagnetism in (Ga,Mn)As
• Density Functional Theory of Multicomponent Quantum Dots
• Competition of Exchange and Correlation Energies in Two-Dimensional $N$-component Electron Gas Ferromagnetism
• Charge Density Waves in a Quantum Plasma