Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 25, Issue 15, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/25/15/155601
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Funding
- Tsinghua University Initiative Scientific Research Program [20121087986]
- ERC Advanced Grant [291472]
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We propose the concept of 'topological Hamiltonian' for topological insulators and superconductors in interacting systems. The eigenvalues of the topological Hamiltonian are significantly different from the physical energy spectra, but we show that the topological Hamiltonian contains the information of gapless surface states, therefore it is an exact tool for topological invariants.
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