Emergence of nearly flat bands through a kagome lattice embedded in an epitaxial two-dimensional Ge layer with a bitriangular structure

Autor:	Taisuke Ozaki, Rainer Friedlein, Yukiko Yamada-Takamura, Shinya Yoshimoto, Chi-Cheng Lee, Hiroyuki Yamane, Antoine Fleurence, Yuki Fukaya, Kozo Mukai, Nobuhiro Kosugi, Jun Yoshinobu
Rok vydání:	2020
Předmět:	Zirconium diboride Materials science Condensed matter physics 02 engineering and technology 021001 nanoscience & nanotechnology Epitaxy 01 natural sciences chemistry.chemical_compound chemistry Lattice (order) 0103 physical sciences Flat band Thin film 010306 general physics 0210 nano-technology
Zdroj:	Physical Review B. 102
ISSN:	2469-9969 2469-9950
DOI:	10.1103/physrevb.102.201102
Popis:	Ge atoms segregating on zirconium diboride thin films grown on Ge(111) were found to crystallize into a two-dimensional bitriangular structure, which was recently predicted to be a flat band material through an embedded kagome lattice. Angle-resolved photoelectron emission experiments together with theoretical calculations pointed out the existence of a nearly flat band in spite of non-negligible in-plane long-range hopping and interactions with the substrate. This provides an experimental verification for the fact that a flat band can emerge from the electronic coupling between atoms and not from the geometry of the atomic structure.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0911f7a2d263ad411001e3c3f6c9509b https://doi.org/10.1103/physrevb.102.201102 Zobrazit plný text záznamu