Jovanovic Milena, Schoop Leslie M
Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States.
J Am Chem Soc. 2022 Jun 22;144(24):10978-10991. doi: 10.1021/jacs.2c04183. Epub 2022 Jun 8.
Compounds featuring a kagome lattice are studied for a wide range of properties, from localized magnetism to massless and massive Dirac Fermions. These properties come from the symmetry of the kagome lattice, which gives rise to Dirac cones and flat bands. However, not all compounds with a kagome sublattice show properties related to it. We derive chemical rules predicting if the low-energy physics of a material is determined by the kagome sublattice and bands arising from it. After sorting out all known crystals with the kagome lattice into four groups, we use chemical heuristics and local symmetry to explain additional conditions that need to be met to have kagome bands near the Fermi level.
具有 Kagome 晶格的化合物因其广泛的性质而被研究，从局域磁性到无质量和有质量的狄拉克费米子。这些性质源于 Kagome 晶格的对称性，它产生了狄拉克锥和平带。然而，并非所有具有 Kagome 子晶格的化合物都表现出与之相关的性质。我们推导了化学规则，以预测材料的低能物理是否由 Kagome 子晶格及其产生的能带所决定。在将所有已知的具有 Kagome 晶格的晶体分为四类之后，我们使用化学启发法和局部对称性来解释在费米能级附近具有 Kagome 能带还需要满足的其他条件。
