Fractional Topological Insulators

被引：252

作者：

Levin, Michael ^{[1
,2
]}

Stern, Ady ^{[3
]}

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[2] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93109 USA

[3] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 19期

关键词：

QUANTUM HALL STATES;

D O I：

10.1103/PhysRevLett.103.196803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze generalizations of two-dimensional topological insulators which can be realized in interacting, time reversal invariant electron systems. These states, which we call fractional topological insulators, contain excitations with fractional charge and statistics in addition to protected edge modes. In the case of s(z) conserving toy models, we show that a system is a fractional topological insulator if and only if sigma(sH)/e(*) is odd, where sigma(sH) is the spin-Hall conductance in units of e/2 pi, and e(*) is the elementary charge in units of e.

引用

页数：4

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