Topological insulator: Both two- and three-dimensional
Topological insulators are a special type of insulators which have become one of the research focuses of condensed matter physics in recent years.Electrons inside a topological insulator cannot conduct electrical current,just as in a usual insulator,e.g.,diamond.But at the boundaries of a topological insulator to vacuum or a usual insulator,there always exist conducting channels in which electrons behave as in a good metal.Furthermore,the very existence of the conducting channels,so-called surface or edge states,is determined by the topological properties of the bulk energy band,and therefore is robust against the contamination at the surfaces/edges.
condensed matter physics、energy band、edge states、type of
07
O4(物理学)
This work was supported by the National Natural Science Foundation of China10974237;91021006;the Knowledge Innovation Program of Chinese Academy of Sciences
2012-08-27（万方平台首次上网日期，不代表论文的发表时间）
148-149
