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Antiferromagnetic states and phase separation in doped AA-stacked graphene bilayers
A. O. Sboychakov, A. V. Rozhkov, A. L. Rakhmanov +1
We study electronic properties of AA-stacked graphene bilayers. In the single-particle approximation such a system has one electron band and one hole band crossing the Fermi level.…
Localized electron states near the armchair edge of graphene
P. A. Maksimov, A. V. Rozhkov, A. O. Sboychakov
It is known that zigzag graphene edge is able to support edge states: there is a non-dispersive single-electron band localized near the zigzag edge. However, it is generally believ…
Electronic phase separation in iron pnictides
A. O. Sboychakov, A. V. Rozhkov, K. I. Kugel +2
A mechanism for electronic phase separation in iron pnictides is proposed. It is based on the competition between commensurate and incommensurate spin-density-wave phases in a syst…
Metal-insulator transition and phase separation in doped AA-stacked graphene bilayers
A. O. Sboychakov, A. L. Rakhmanov, A. V. Rozhkov +1
We investigate the doping of AA-stacked graphene bilayers. Applying a mean field theory at zero temperature we find that, at half-filling, the bilayer is an antiferromagnetic insul…