Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-08-06
Phys. Rev. B 76, 180404(R) (2007)
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 3 figures. Final version to appear in Phys. Rev. B as a Rapid Communication
Scientific paper
10.1103/PhysRevB.76.180404
We study a class of two-dimensional spin models with the Kitaev-type couplings in mosaic structure lattices to implement topological orders. We show that they are exactly solvable by reducing them to some free Majorana fermion models with gauge symmetries. The typical case with a 4-8-8 close packing is investigated in detail to display the quantum phases with Abelian and non-Abelian anyons. Its topological properties characterized by Chern numbers are revealed through the edge modes of its spectrum.
Sun Chang-Pu
Yang Sheng
Zhou Dong-Lin
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