Interacting fermionic topological insulators / superconductors in three dimensions

Content Provider	Semantic Scholar
Author	Wang, Chong Senthil, T.
Copyright Year	2014
Abstract	Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Symmetry protected topological (SPT) phases are a minimal generalization of the concept of topological insulators to interacting systems. In this paper, we describe the classification and properties of such phases for three-dimensional (3D) electronic systems with a number of different symmetries. For symmetries representative of all classes in the famous 10-fold way of free-fermion topological insulators/superconductors, we determine the stability to interactions. By combining with results on bosonic SPT phases, we obtain a classification of electronic 3D SPT phases for these symmetries. In cases with a normal U (1) subgroup we show that this classification is complete. We describe the nontrivial surface and bulk properties of these states. In particular, we discuss interesting correlated surface states that are not captured in a free-fermion description. We show that in many, but not all, cases, the surface can be gapped while preserving symmetry if it develops intrinsic topological order.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://dspace.mit.edu/openaccess-disseminate/1721.1/88630
Language	English
Access Restriction	Open
Subject Keyword	3D computer graphics Class Dimensions Generalization (Psychology) Hall-effect thruster Html Link Type - copyright Interaction Subgroup A Nepoviruses Surface states Symmetry protected topological order Terms of service Topological insulator benefit
Content Type	Text
Resource Type	Article