Pseudospin Magnetism in Graphene
Loading...
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
We predict that neutral graphene bilayers are pseudospin magnets in which the charge density-contribution from each valley and spin spontaneously shifts to one of the two layers. The band structure of this system is characterized by a momentum-space vortex which is responsible for unusual competition between band and kinetic energies leading to symmetry breaking in the vortex core. We discuss the possibility of realizing a pseudospin version of ferromagnetic metal spintronics in graphene bilayers based on hysteresis associated with this broken symmetry.
5 pages, 4 figures; added figure 1, modified introduction and discussion; updated references
5 pages, 4 figures; added figure 1, modified introduction and discussion; updated references