期刊
EUROPHYSICS LETTERS
卷 70, 期 6, 页码 824-830出版社
EDP SCIENCES S A
DOI: 10.1209/epl/i2005-10046-x
关键词
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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.
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