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

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题名:	Emergence of nearly flat bands through a kagome lattice embedded in an epitaxial two-dimensional Ge layer with a bitriangular structure
作者:	Fleurence, A.;Lee, C.-C.;Friedlein, R.;Fukaya, Y.;Yoshimoto, S.;Mukai, K.;Yamane, H.;Kosugi, N.;Yoshinobu, J.;Ozaki, T.;Yamada-Takamura, Y.
日期:	2020-11-04
上传时间:	2020-11-05 12:10:13 (UTC+8)
摘要:	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.
關聯:	Phys. Rev. B 102(20), 201102(R)
DOI:	10.1103/PhysRevB.102.201102
显示于类别:	[物理學系暨研究所] 期刊論文

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