Correlated Topological Insulators with Mixed Valence
arXiv:1211.5863 · doi:10.1103/PhysRevLett.110.096401
Abstract
We propose the local density approximation (LDA)+Gutzwiller method incorporating Green's function scheme to study the topological physics of correlated materials from the first-principles. Applying this method to typical mixed valence materials SmB6, we found its non-trivial Z2 topology, indicating that SmB6 is a strongly correlated topological insulator (TI). The unique feature of this compound is that its surface states contain three Dirac cones in contrast to most known TIs.
5 pages, 5 figures
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