Triangular Honeycombs (IMAGE)
Caption
The measured electronic density (left) on the triangular indium lattice (right). The figure highlights how electrons (in yellow) do not sit on the atomic position but they rather occupy the voids in between (red and blue). As a result, an emergent honeycomb connectivity arises formally equivalent to the well-known graphene. At the same time, this "hidden" honeycomb motif equips indenene with a much larger bandgap, upgrading it to a superior quantum spin Hall system.
Credit
ct.qmat
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