Electronic Structure and Surface-Localized State of Hyper-Graphite Network

We study electronic structures of an extended three-dimensional graphite network and its slab performing of the tight binding model. The one of networks we study is bipartite and three-coordinated, and also found in some materials like α-ThSi2. The electronic structures of this networks have characters which are peculiar to 2D graphite. One of these characters is that these networks are a semi metal and the other is that these networks which are cut in proper direction have a surface localized states (Edge State), which originate from the topological feature of the network as well as the zigzag edge in 2D graphite. We call these networks which are made by concept extending graphite network for higher dimensions ‘the Hyper Graphite’.