Correlated topological insulators with mixed valence.

نویسندگان

  • Feng Lu
  • JianZhou Zhao
  • Hongming Weng
  • Zhong Fang
  • Xi Dai
چکیده

We propose the local density approximation+Gutzwiller method incorporating a Green's function scheme to study the topological physics of correlated materials from the first principles. Applying this method to typical mixed valence materials SmB(6), we find its nontrivial Z(2) topology, indicating that SmB(6) is a strongly correlated topological insulator. The unique feature of this compound is that its surface states contain three Dirac cones in contrast to most known topological insulators.

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عنوان ژورنال:
  • Physical review letters

دوره 110 9  شماره 

صفحات  -

تاریخ انتشار 2013