Plane Frobenius Sandwiches

Buckyball sandwiches

Two-dimensional (2D) materials have considerably expanded the field of materials science in the past decade. Even more recently, various 2D materials have been assembled into vertical van der Waals heterostacks, and it has been proposed to combine them with other low-dimensional structures to create new materials with hybridized properties. We demonstrate the first direct images of a suspended ...

Bipartite Sandwiches

A semideenite relaxation (?) for the problem of nding the maximum number (?) of edges in a complete bipartite subgraph of a bipartite graph ? = (V1 V2; E) is considered. For a large class of graphs, the relaxation is better than the LP-relaxation described in 8]. It is shown that (?) is bounded from above by the Lovv asz theta function (LQ(?)) of the graph LQ(?) related to the line graph of ?. ...

Fault Tolerant Firewall Sandwiches

Superconductivity: squash and sandwiches.

nature materials | VOL 7 | DECEMBER 2008 | www.nature.com/naturematerials 929 Erio Tosatti is at the Scuola Internazionale Superiore di Studi Avanzati (SISSA), via Beirut 2, 34014 Trieste, Italy; at the International Centre for Theoretical Physics (ICTP), Strada Costiera 11, 34014, Trieste, Italy; and at the CNR-INFM Democritos National Simulation Center, via Beirut 2, 34014 Trieste, Italy. e-m...

Graphene veils and sandwiches.

We report a new and highly versatile approach to artificial layered materials synthesis which borrows concepts of molecular beam epitaxy, self-assembly, and graphite intercalation compounds. It readily yields stacks of graphene (or other two-dimensional sheets) separated by virtually any kind of "guest" species. The new material can be "sandwich like", for which the guest species are relatively...