Superconducting Phases in Lithium Decorated Graphene LiC6

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...

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...

Electronic structure of superconducting KC8 and nonsuperconducting LiC6 graphite intercalation compounds: evidence for a graphene-sheet-driven superconducting state.

We have performed photoemission studies of the electronic structure in LiC(6) and KC(8), a nonsuperconducting and a superconducting graphite intercalation compound, respectively. We have found that the charge transfer from the intercalant layers to graphene layers is larger in KC(8) than in LiC(6), opposite of what might be expected from their chemical composition. We have also measured the str...

Structural and electronic properties of lithium intercalated graphite LiC6

We calculate the lattice properties and electronic structure of graphite and LiC6 within the most widely used density-functional theory implementation, the local density approximation ~LDA!. Improvements to the LDA in the form of a generalized gradient approximation ~GGA! are explored. Structural parameters predicted by the LDA, as expected, underestimate experiment within a 1%–2% margin of acc...

Inorganic Nanostructures Decorated Graphene