恰好就是喜闻乐见的honeycomb lattice的对偶呀，那么Kagome lattice就一定具有flat band，而且能量为-2。
平带的出现一般是由于destructive interference导致的，典型的具有平带的格子是Lieb lattice和Kagome。关于这个...
Identification of electronic structure in a kagome lattice. Article ADS MathSciNet Google Scholar Anderson, P. W. More is different. Science 177, 393–396 (1972). Article ADS CAS Google Scholar Lieb, E. H. Two theorems on the Hubbard model. Phys. Rev. Lett. 62, 1201–1204 (1989)....
The model has been shown to host a variety of ordered ground states such as charge density wave (CDW) order and superconductivity on several geometries, including the square, honeycomb, and Lieb lattices. In this work, we study CDW formation in the Holstein model on the kagome lattice, using...
摘要:Employing large-scale quantum Monte Carlo simulations, we study the extended X X Z model on the kagome lattice. A Z 2 quantum spin liquid phase with effective even Ising gauge field structure emerges from the delicate balance among three symmetry-breaking phases including stripe solid, stagge...
(see Fig.1d). The vanadium sublattice is a structurally perfect kagome lattice (see Fig.1g). There are two distinct Sb sublattices. The sublattice formed by Sb1 atoms is a simple hexagonal net, centerd on each kagome hexagon. The Sb2 sublattice creates a graphen like Sb sheet below ...
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open an energy gap in their electronic spectra but can cause (i) approximation of the energy cones, (ii) anisotropy in the energy levels, and (iii) deformation of the flat band, such that the triply degenerate Dirac point in the Lieb lattice transforms into two doubly degenerate Dirac ...
shares the same lattice structure in its inner part with the spatially anisotropic two-dimensional Kagome lattice in which an intermediate phase with a similar behavior is certainly observed, the intermediate phases of these models are the ferrimagnetic one of the unconventional non-Lieb-Mattis type....
Optimizing translationally invariant infinite-projected entangled pair states, we investigate the spin-2 Affleck-Kennedy-Lieb-Tasaki and spin-1 Heisenberg models on the kagome lattice as a function of magnetic field. We found that the magnetization curves offer a wide variety of compressible and ...