Abstract:
The features of graphene on a ferromagnetic substrate are theoretically studied. It is demonstrated that such a system exhibits an unstable electronic state at low temperatures. Namely, under certain conditions, the perfect uniform ferromagnetic polarization becomes spontaneously broken toward the formation of a canted state. Canting in the substrate gives rise to the band gap opening in the single-electron spectrum of graphene. The width of this gap is calculated, and the conditions necessary for the observation of such instability in the experiment are discussed.
Citation:
D. N. Dresvyankin, A. V. Rozhkov, A. O. Sboychakov, “Magnetoelectronic instability of graphene on a ferromagnetic substrate”, Pis'ma v Zh. Èksper. Teoret. Fiz., 114:12 (2021), 824–832; JETP Letters, 114:12 (2021), 763–770