期刊
SOLID STATE COMMUNICATIONS
卷 142, 期 3, 页码 123-127出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2007.02.013
关键词
thin films; crystal structure and symmetry; electronic band structure; dielectric response
Novel systems of layered graphene are attracting interest for theories and applications. The stability, band structures of few-layer graphite films, and their dependence on electric field applied along the c-axis are examined within the density functional theory. We predict that those of Bernal type and also rhombohedral type tri- and tetra-layer graphite films exhibit stability. Rhombohedral-type systems, including AB-bilayer, show variable band gap induced by perpendicular electric fields, whereas the other systems, such as the Bernal-type films, stay semi-metallic. (c) 2007 Elsevier Ltd. All rights reserved.
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