Artificial flat band systems: from lattice models to experiments

• Published in: Advances in physics: X Vol. 3; no. 1; p. 1473052
• Main Authors: Leykam, Daniel, Andreanov, Alexei, Flach, Sergej
• Format: Journal Article
• Language: English
• Published: Taylor & Francis 01.01.2018; Taylor & Francis Group
• Subjects: Aharonov-Bohm cage; compact localized state; Frustration; Lieb lattice; line graph

Certain lattice wave systems in translationally invariant settings have one or more spectral bands that are strictly flat or independent of momentum in the tight binding approximation, arising from either internal symmetries or fine-tuned coupling. These flat bands display remarkable strongly intera...