New class of flat-band models on tetragonal and hexagonal lattices: Gapped versus crossing flat bands

We propose a new class of tight-binding models where a flat band is either gapped from or crossing right through a dispersive band on two-band (i.e., two sites/unit cell) tetragonal and honeycomb lattices. By imposing a condition on the hopping parameters for generic models with up to third-neighbor...

Ausführliche Beschreibung

Bibliographische Detailangaben

Veröffentlicht in:	arXiv.org 2017-10
Hauptverfasser:	Misumi, Tatsuhiro, Aoki, Hideo
Format:	Artikel
Sprache:	eng
Schlagworte:	Dispersion Honeycomb construction Lattices Physics - High Energy Physics - Lattice Physics - Materials Science Physics - Superconductivity Superconductivity Unit cell
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!