Systematic construction of topological flat-band models by molecular-orbital representation
Tomonari Mizoguchi, Yasuhiro Hatsugai
Abstract
On the basis of the ``molecular-orbital'' representation which describes generic flat-band models, we propose a systematic way to construct a class of flat-band models with finite-range hoppings that have topological natures. In these models, the topological natures are encoded not into the flat band itself but into the dispersive bands touching the flat band. Such a band structure may become a source of exotic phenomena arising from the combination of flat bands, topology, and correlations.
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