Strain control of magnetism in graphene decorated by transition-metal atoms

Embedding transition-metal atoms in graphene: structure, bonding, and magnetism.

We present a density-functional-theory study of transition-metal atoms (Sc-Zn, Pt, and Au) embedded in single and double vacancies (SV and DV) in a graphene sheet. We show that for most metals, the bonding is strong and the metal-vacancy complexes exhibit interesting magnetic behavior. In particular, an Fe atom on a SV is not magnetic, while the Fe@DV complex has a high magnetic moment. Surpris...

Tunable superconducting phase transition in metal-decorated graphene sheets.

We have produced graphene sheets decorated with a nonpercolating network of nanoscale tin clusters. These metal clusters both efficiently dope the graphene substrate and induce long-range superconducting correlations. We find that despite structural inhomogeneity on mesoscopic length scales (10-100 nm), this material behaves electronically as a homogenous dirty superconductor with a field-effec...

1 Tunable Superconducting Phase Transition in Metal-Decorated Graphene Sheets

B.M. Kessler, Ç. Ö. Girit, A. Zettl, and V. Bouchiat Department of Physics, University of California at Berkeley, Berkeley, California, 94720 USA Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720 USA Center of Integrated Nanomechanical Systems, Berkeley, California, 94720 USA Department of Physics, University of California at Berkeley, Berkeley, Cal...

Proximity-induced magnetism in transition-metal substituted graphene

We investigate the interactions between two identical magnetic impurities substituted into a graphene superlattice. Using a first-principles approach, we calculate the electronic and magnetic properties for transition-metal substituted graphene systems with varying spatial separation. These calculations are compared for three different magnetic impurities, manganese, chromium, and vanadium. We ...

Trapping of metal atoms by reconstructed defects in graphene