拓扑绝缘体及其研究进展_叶飞.pdf

* 1 2, 叶 飞 苏 刚 ( 1 100049) ( 2 100049) . , ., : , . , .. ,, , Topological insulators 1 2, YE Fei SU Gang ( 1 Colleg e of M ate rials S cie nce and Op toelec tr onic T ec hnology , Gr adu ated Univ er sity of Chinese A c ademy of S ciences, Beij ing 100049, China ( 2 Colleg e of Phy sic al S cie nces, Grad uate d Univ e rsity of Chinese A c ade my of S ciences, Beij ing 100049, China Abstract new kind of insulator has been proposed recently, which is fully gapped in the bulk but has a metallic edge or surface states that are protected topologically. These electronic materials are dubbed as topological insulators (TIs) . Generally speaking, TIs can be divided into two classes. One is the quantum Hall system which was found in the 1980s to show breaking of time reversal symmetry (TRS) , and another is the newly discovered type which does not demonstrate TRS breaking and has at- tracted much attention recently. This article presents a brief review of recent advances in the development of TIs. Keywords topological insulator, quantum Hall effect, quantum spin Hall effect,topological classification ( 1 引言 1( b) ) ,. , , ., 1) . . , ( 1(a) ) ,, . ., * ( : , 2010- 05- 10 ., . Email: gsu@ gucas. ac. cn , , 1) , , .