Type:
Journal
Description:
Van der Waals (vdW) epitaxy is an attractive method for the fabrication of vdW heterostructures. Here Sb 2 Te 3 films grown on three different kind of graphene substrates (monolayer epitaxial graphene, quasi freestanding bilayer graphene and the SiC (6√ 3× 6√ 3) R30 buffer layer) are used to study the vdW epitaxy between two 2-dimensionally (2D) bonded materials. It is shown that the Sb 2 Te 3/graphene interface is stable and that coincidence lattices are formed between the epilayers and substrate that depend on the size of the surface unit cell. This demonstrates that there is a significant, although relatively weak, interfacial interaction between the two materials. Lattice matching is thus relevant for vdW epitaxy with two 2D bonded materials and a fundamental design parameter for vdW heterostructures.
Publisher:
Nature Publishing Group
Publication date:
14 Dec 2015
Biblio References:
Volume: 5 Issue: 1 Pages: 1-8
Origin:
Scientific reports