1. Monolayer Kagome metals AV3Sb5
- Author
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Kim, Sun-Woo, Oh, Hanbit, Moon, Eun-Gook, Kim, Youngkuk, Kim, Sun-Woo [0000-0002-5185-5119], Moon, Eun-Gook [0000-0003-1863-4901], Kim, Youngkuk [0000-0002-1680-7007], and Apollo - University of Cambridge Repository
- Abstract
Recently, layered kagome metals AV3Sb5 (A = K, Rb, and Cs) have emerged as a fertile platform for exploring frustrated geometry, correlations, and topology. Here, using first-principles and mean-field calculations, we demonstrate that AV3Sb5 can crystallize in a mono-layered form, revealing a range of properties that render the system unique. Most importantly, the two-dimensional monolayer preserves intrinsically different symmetries from the three-dimensional layered bulk, enforced by stoichiometry. Consequently, the van Hove singularities, logarithmic divergences of the electronic density of states, are enriched, leading to a variety of competing instabilities such as doublets of charge density waves and s- and d-wave superconductivity. We show that the competition between orders can be fine-tuned in the monolayer via electron-filling of the van Hove singularities. Thus, our results suggest the monolayer kagome metal AV3Sb5 as a promising platform for designer quantum phases.
- Published
- 2023