Hidden mechanism for embedding the flat bands of Lieb, kagome, and checkerboard lattices in other structures

淡江大學機構典藏 > 理學院 > 物理學系暨研究所 > 期刊論文 > Item 987654321/117051

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题名:	Hidden mechanism for embedding the flat bands of Lieb, kagome, and checkerboard lattices in other structures
作者:	Chi-Cheng Lee;Antoine Fleurence;Yukiko Yamada-Takamura;Taisuke Ozaki
日期:	2019-07-31
上传时间:	2019-09-19 12:10:41 (UTC+8)
出版者:	American Physical Society
摘要:	The interplay of hopping parameters that can give rise to flat bands in consequence of quantum interference in electronic, photonic, and other interesting materials has become an extensively studied topic. Most of the recognized structures having flat bands are lattices that can be understood by the mathematical theory of line graphs, such as the Lieb, kagome, and checkerboard lattices. Here, we demonstrate that the structures that can realize the same kinds of flat bands given by those well-known lattices hosting exotic quantum phases are more flexible. The flat bands belonging to the recognized structures can be ideally embedded into new structures that cannot be considered as the original ones in terms of a unitary transformation. The uncovered mechanism enriches the understanding of physics behind the localized quantum states and broadens the choice of materials that can be used for designing electronic and photonic devices from the zero band dispersion.
關聯:	Phys. Rev. B 100, 045150
DOI:	10.1103/PhysRevB.100.045150
显示于类别:	[物理學系暨研究所] 期刊論文

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