Interacting electrons in graphene nanoribbons in the lowest Landau level
2011 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 84, no 7, 075407- p.Article in journal (Refereed) Published
e study the effect of electron-electron interaction and spin on electronic and transport properties of gated graphene nanoribbons (GNRs) in a perpendicular magnetic field in the regime of the lowest Landau level (LL). The electron-electron interaction is taken into account using the Hartree and Hubbard approximations, and the conductance of GNRs is calculated on the basis of the recursive Greens function technique within the Landauer formalism. We demonstrate that, in comparison to the one-electron picture, electron-electron interaction leads to the drastic changes in the dispersion relation and structure of propagating states in the regime of the lowest LL showing a formation of the compressible strip and opening of additional conductive channels in the middle of the ribbon. We show that the latter are very sensitive to disorder and get scattered even if the concentration of disorder is moderate. In contrast, the edge states transport is very robust and cannot be suppressed even in the presence of a strong spin-flipping.
Place, publisher, year, edition, pages
American Physical Society , 2011. Vol. 84, no 7, 075407- p.
National CategoryEngineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-70105DOI: 10.1103/PhysRevB.84.075407ISI: 000293374700003OAI: oai:DiVA.org:liu-70105DiVA: diva2:435547
Artsem Shylau and Igor Zozoulenko, Interacting electrons in graphene nanoribbons in the lowest Landau level, 2011, Physical Review B. Condensed Matter and Materials Physics, (84), 7, 075407.
Copyright: American Physical Society