Spin polarization in open quantum dots
2006 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, Vol. 73, no 3, 035319- p.Article in journal (Refereed) Published
We investigate coherent transport through open lateral quantum dots using recursive Green's function technique, incorporating exchange-correlation effects within the density functional theory (DFT) in the local spin-density approximation. At low electron densities the current is spin polarized and electron density in the dot shows a strong spin polarization. As the electron density increases the spin polarization in the dot gradually diminishes. These findings are consistent with available experimental observations. Results of our DFT-based modeling indicate that utilization of the simplified approaches that use phenomenological parameters and/or model Hamiltonians might not be always reliable for theoretical predictions as well as interpretations of the experiments.
Place, publisher, year, edition, pages
2006. Vol. 73, no 3, 035319- p.
spin polarised transport, semiconductor quantum dots, Green's function methods, exchange interactions (electron), density functional theory, electronic density of states
National CategoryPhysical Sciences
IdentifiersURN: urn:nbn:se:liu:diva-13472DOI: 10.1103/PhysRevB.73.035319OAI: oai:DiVA.org:liu-13472DiVA: diva2:20827