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

被引：3

作者：

Fleurence, A. ^{[1
]}

Lee, C-C ^{[2
,3
]}

Friedlein, R. ^{[1
,6
]}

Fukaya, Y. ^{[4
]}

Yoshimoto, S. ^{[2
]}

Mukai, K. ^{[2
]}

Yamane, H. ^{[5
,7
]}

Kosugi, N. ^{[5
,8
]}

Yoshinobu, J. ^{[2
]}

Ozaki, T. ^{[2
]}

Yamada-Takamura, Y. ^{[1
]}

机构：

[1] Japan Adv Inst Sci & Technol JAIST, Sch Mat Sci, Nomi, Ishikawa 9231292, Japan

[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[3] Tamkang Univ, Dept Phys, New Taipei 251301, Taiwan

[4] Japan Atom Energy Agcy, Adv Sci Res Ctr, 2-4 Shirakata, Naka, Ibaraki 3191195, Japan

[5] Inst Mol Sci, Okazaki, Aichi 4448585, Japan

[6] Meyer Burger Germany GmbH, D-09337 Hohenstein Ernstthal, Germany

[7] RIKEN, SPring 8 Ctr, Sayo, Hyogo 6795148, Japan

[8] KEK, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

来源：

PHYSICAL REVIEW B | 2020年 / 102卷 / 20期

关键词：

HUBBARD-MODEL; FERROMAGNETISM; STATES;

D O I：

10.1103/PhysRevB.102.201102

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

引用

页数：6

共 17 条

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