Kagome bands disguised in a coloring-triangle lattice

Shunhong Zhang, Meng Kang, Huaqing Huang, Wei Jiang, Xiaojuan Ni, Lei Kang, Shunping Zhang, Hongxing Xu, Zheng Liu, Feng Liu

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The kagome bands hosting exotic quantum phases generally and understandably pertain only to a kagome lattice. This has severely hampered the research of kagome physics due to the lack of real kagome-lattice materials. Interestingly, we discover that a coloring-triangle (CT) lattice, named after color-triangle tiling, also hosts kagome bands. We demonstrate first theoretically the equivalency between the kagome and CT lattices, and then computationally in photonic (waveguide lattice) and electronic (Au overlayer on electride Ca2N surface) systems by first-principles calculations. The theory can be generalized to even distorted kagome and CT lattices to exhibit ideal kagome bands. Our findings open an avenue to explore the alluding kagome physics.

Original languageEnglish (US)
Article number100404
JournalPhysical Review B
Volume99
Issue number10
DOIs
StatePublished - Mar 18 2019
Externally publishedYes

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