6533b858fe1ef96bd12b6cdf
RESEARCH PRODUCT
Exchange-correlation energy of a multicomponent two-dimensional electron gas
M KoskinenK. KarkkainenM. ManninenStephanie Reimannsubject
PhysicsSIMPLE (dark matter experiment)Condensed Matter - Mesoscale and Nanoscale PhysicsCondensed matter physicsFOS: Physical sciencesElectronQuantum dotMesoscale and Nanoscale Physics (cond-mat.mes-hall)Atomic physicsFermi gasParametrizationEnergy (signal processing)Quantum wellPhase diagramdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-10-03 |