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Arbitrary Chern number generation in the three-band model from momentum space

A simple, general rule for generating a three-band model with arbitrary Chern numbers is given. The rule is based on the idea of monopole charge-changing unitary operations and can be realized by two types of simple unitary operations on the original Hamiltonian. A pair of monopole charges are required to produce desired topological numbers in the three-band model. The set of rules presented here offers a way to produce lattice models of any desired Chern numbers for three-sublattice situations.

preprint2014arXivOpen access
Soo-Yong LeeJin-Hong ParkGyungchoon GoJung Hoon Han
cond-mat.str-el
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Open access4 authors1 topic
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Soo-Yong LeeJin-Hong ParkGyungchoon GoJung Hoon Han

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