Coherent phases and magnetoexcitons in graphene
2009 (English)In: PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, ISSN 1862-6300, Vol. 206, no 5, 927-930 p.Article in journal (Refereed) Published
Unique band structure peculiarities of graphene imply that near Fermi level electrons are described by two-dimensional Dirac equation for massless particles. We investigate how these peculiarities manifest in electron-hole pairing and properties of indirect magnetoexcitons in two spatially separated, independently gated graphene layers. For electron-hole pairing, we derive asymptotical expressions for the gap in energy spectrum and discuss system behavior at various controlling parameters. We derive dispersion relations for magnetoexcitons and their effective-mass decompositions, and also discuss a possibility of magnetoexcitonic super-fluidity. The systems under consideration can reveal coherent properties, dissipationless currents and Josephson phenomena at room temperature.
Place, publisher, year, edition, pages
2009. Vol. 206, no 5, 927-930 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-19390DOI: 10.1002/pssa.200881360OAI: oai:DiVA.org:liu-19390DiVA: diva2:224872