Year: 2022
Type: article
Abstract: This work considers a two-dimensional artificial triangular anti-dot lattice (TAL): a semiconductor-based artificial crystal hosting Dirac cones, flat bands, and Fermi surface nesting. All such single-particle features have dramatic implications for the emergent correlated phases. This work predominantly focuses on the existence of a robust flat band and enumerates the possible correlated phases that follow. We find that the flat band is generated, in the single-particle theory, when charges align themselves along a kagome lattice with the same period as the TAL. The correlated phases are studied using complementary techniques of expansion in strong and weak Coulomb interactions. Our microscopic modeling shows that for the purpose of generating strongly correlated phases, hole-doped TALs have significant advantages over electron-doped ones.
Authors: Z. E. Krix, H. D. Scammell, O. P. Sushkov
Institution: UNSW Sydney
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: Australian Research Council
OpenAlex ID: W3204087220