Certain lattice wave systems in translationally invariant settings have one or more spectral
bands that are strictly flat or independent of momentum in the tight binding approximation …

Flat bands–single-particle energy bands–in tight-binding lattices, aka networks, have
attracted attention due to the presence of macroscopic degeneracies and their sensitivity to …

A van der Waals heterostructure is a type of metamaterial that consists of vertically stacked
two-dimensional building blocks held together by the van der Waals forces between the …

The ground state and transport properties of the Lieb lattice flat band in the presence of an
attractive Hubbard interaction are considered. It is shown that the superfluid weight can be …

We study exciton polaritons in a two-dimensional Lieb lattice of micropillars. The energy
spectrum of the system features two flat bands formed from S and P x, y photonic orbitals …

Among two-dimensional lattices, both kagome and Lieb lattices have been extensively
studied, showing unique physics related to their exotic flat and Dirac bands. Interestingly, we …

The band structure and electronic properties of a material are defined by the sort of
elements, the atomic registry in the crystal, the dimensions, the presence of spin–orbit …

Topological properties of the Lieb lattice, ie, the edge-centered square lattice, have been
extensively studied and are, however, mostly based on theoretical models without …

Recently there has been intense interest in kagome metals, which are expected to host flat
bands (FBs). However, the observed “FBs” are not flat over the whole two-dimensional …

We study the topological properties of a Haldane model on a band deformed dice lattice,
which has three atoms per unit cell (call them A, B, and C) and the spectrum comprises of …