Volume 70, Number 6, June 2005
|Page(s)||824 - 830|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||13 May 2005|
Sufficient conditions for topological order in insulators
Center for Nonlinear Studies and Theoretical Division, Los Alamos National Laboratory Los Alamos, NM 87545, USA
Corresponding author: email@example.com
Accepted: 26 April 2005
We prove the existence of low-energy excitations in insulating systems at general filling factor under certain conditions, and discuss in which cases these may be identified as topological excitations. In the specific case of half-filling this proof provides a significantly shortened proof of the recent higher-dimensional Lieb-Schultz-Mattis theorem.
PACS: 75.10.Jm – Quantized spin models
© EDP Sciences, 2005
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