Figure 1
From: Robust ferromagnetism in hydrogenated graphene mediated by spin-polarized pseudospin
Direct versus “mediated” magnetic interactions in hydrogenated graphene. (a) The localized magnetic moments generated by an H adatom at the center: from left to right, an H adatom at an A sublattice site and an H adatom at a B sublattice site of the graphene. The electron density is shown for the spin-up (yellow) and spin-down (blue) electrons at 0.0027 |e|/Å3. (b) Schematic illustration of two different types of magnetic interaction between the localized spins in hydrogenated graphene: the direct (DR) exchange interaction, JDR, which arises from the overlap between the localized wavefunctions (represented by triangles), and the long-range (LR) magnetic interaction, \(\frac{{J}_{LR}^{FM}}{|{\rm{\Lambda }}|}\) or \(\frac{{J}_{LR}^{AFM}}{|{\rm{\Lambda }}|}\), mediated by the spin-polarized pseudospin of graphene (zoomed-in view).
