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복잡계 이론물리 연구단
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Flat-band engineering of mobility edges

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Title
Flat-band engineering of mobility edges
Author(s)
Carlo Danieli; Joshua D. Bodyfelt; Sergej Flach
Publication Date
2015-06
Journal
PHYSICAL REVIEW B, v.91, no.23, pp.235134-1 - 235134-7
Publisher
AMER PHYSICAL SOC
Abstract
Properly modulated flat-band lattices have a divergent density of states at the flat-band energy. Quasiperiodic modulations are known to host a metal-insulator transition already in one space dimension. Their embedding into flat-band geometries consequently allows for a precise engineering and fine tuning of mobility edges. We obtain analytic expressions for singular mobility edges for two flat-band lattice examples. In particular, we engineer cases with arbitrarily small energy separations of mobility edge, zeroes, and divergencies.
URI
http://pr.ibs.re.kr/handle/8788114/1666
DOI
10.1103/PhysRevB.91.235134
ISSN
1098-0121
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > Journal Papers (저널논문)
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