Regensburg 2016 – scientific programme

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DS: Fachverband Dünne Schichten

DS 6: Graphene: Theory
(Joint session of DS, DY, HL, MA, O and TT organized by HL)

DS 6.3: Talk

Monday, March 7, 2016, 10:00–10:15, H17

Finite temperature and electric field effects in the RKKY interaction in graphene and bilayer graphene — •Nicolas Klier¹, Sangeeta Sharma², Oleg Pankratov¹, and Sam Shallcross¹ — ¹Theoretische Festkörperphysik, Universität Erlangen-Nürnberg, Staudtstr. 7-B2, 91058 Erlangen — ²Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle

The Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in Bernal stacked bilayer graphene [1,2] is shown to have a particularly rich dependence on temperature and a layer symmetry breaking electric field. Depending on whether we consider the chemical potential or particle number as the fixed variable we find that an electric field may tune the RKKY between ferromagnetic (FM) and anti-ferromagnetic (AFM) coupling, or an oscillatory and AFM coupling.

[1] N. Klier, S. Shallcross, and O. Pankratov, Phys. Rev. B 90, 245118, 2014.

[2] N. Klier, S. Shallcross, S. Sharma, and O. Pankratov, Phys. Rev. B 92, 205414, 2015.