π-Conjugated Nickel Bis(dithiolene) Complex Nanosheet

Kambe, Tetsuya; Sakamoto, Ryota; Hoshiko, Ken; Takada, Kenji; Miyachi, Mariko; Ryu, Ji Heun; Sasaki, Sono; Kim, Jung-Eun; Nakazato, Kazuhiko; Takata, Masaki; Nishihara, Hiroshi

doi:10.1021/ja312380b

Cited by 776 publications

(736 citation statements)

References 38 publications

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“…It is worth mentioning that first-principles calculations have also revealed the existence of FBs as described by Eq. (3) in an experimentally made organometallic framework [64,67]. …”

Section: B Organometallic Frameworkmentioning

confidence: 99%

Exotic electronic states in the world of flat bands: From theory to material

Liu¹,

Liu²,

Wu³

2014

Chinese Phys. B

213

157

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It has long been noticed that special lattices contain single-electron flat bands (FB) without any dispersion. Since the kinetic energy of electrons is quenched in the FB, this highly degenerate energy level becomes an ideal platform to achieve strongly correlated electronic states, such as magnetism, superconductivity and Wigner crystal. Recently, the FB has attracted increasing interests, because of the possibility to go beyond the conventional symmetry-breaking phases, towards topologically ordered phases, such as lattice versions of fractional quantum Hall states. This article reviews different aspects of FBs in a nutshell. Starting from the standard band theory, we aim to bridge the frontier of FBs with the textbook solid-state physics. Then, based on concrete examples, we show the common origin of FBs in terms of destructive interference, and discuss various many-body phases associated with such a singular band structure. In the end, we demonstrate real FBs in quantum frustrated materials and organometallic frameworks.

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“…It is worth mentioning that first-principles calculations have also revealed the existence of FBs as described by Eq. (3) in an experimentally made organometallic framework [64,67]. …”

Section: B Organometallic Frameworkmentioning

confidence: 99%

Exotic electronic states in the world of flat bands: From theory to material

Liu¹,

Liu²,

Wu³

2014

Chinese Phys. B

213

157

View full text Add to dashboard Cite

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“…The increased spin-orbit coupling in these cases will result in a larger band gap. We note that a related organometallic material, Ni 3 C 12 S 12 , has been synthesized 39 and shown to produce Dirac cones 40 . In this case, however, the metal atoms serve as short linkers rather than connectors, which consist of C 6 S 6 units.…”

mentioning

confidence: 95%

Dirac Cones in two-dimensional conjugated polymer networks

et al. 2014

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Linear electronic band dispersion and the associated Dirac physics has to date been limited to special-case materials, notably graphene and the surfaces of three-dimensional (3D) topological insulators. Here we report that it is possible to create two-dimensional fully conjugated polymer networks with corresponding conical valence and conduction bands and linear energy dispersion at the Fermi level. This is possible for a wide range of polymer types and connectors, resulting in a versatile new family of experimentally realisable materials with unique tuneable electronic properties. We demonstrate their stability on substrates and possibilities for doping and Dirac cone distortion. Notably, the cones can be maintained in 3D-layered crystals. Resembling covalent organic frameworks, these materials represent a potentially exciting new field combining the unique Dirac physics of graphene with the structural flexibility and design opportunities of organic-conjugated polymer chemistry.

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“…Owing to their typically trivial and localized electronic states, MOFs have not attracted much attention from condensed-matter physicists. However, recent experimental success in fabricating atomically layered two-dimensional (2D) MOFs with kagome lattice structures, initiated by the Nishihara group [2][3][4][5], is bridging the gap between condensedmatter physics and chemistry. The Dincȃ group also succeeded in creating 2D MOFs [6,7].…”

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confidence: 99%

First-principles design of a half-filled flat band of the kagome lattice in two-dimensional metal-organic frameworks

et al. 2016

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We design from first principles a type of two-dimensional metal-organic framework (MOF) using phenalenylbased ligands to exhibit a half-filled flat band of the kagome lattice, which is one of a family of lattices that show Lieb-Mielke-Tasaki's flat-band ferromagnetism. Among various MOFs, we find that trans-Au-THTAP (THTAP=trihydroxytriaminophenalenyl) has such an ideal band structure, where the Fermi energy is adjusted right at the flat band due to unpaired electrons of radical phenalenyl. The spin-orbit coupling opens a band gap giving a nonzero Chern number to the nearly flat band, as confirmed by the presence of the edge states in first-principles calculations and by fitting to the tight-binding model. This is a novel and realistic example of a system in which a nearly flat band is both ferromagnetic and topologically nontrivial.

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π-Conjugated Nickel Bis(dithiolene) Complex Nanosheet

Cited by 776 publications

References 38 publications

Exotic electronic states in the world of flat bands: From theory to material

Exotic electronic states in the world of flat bands: From theory to material

Dirac Cones in two-dimensional conjugated polymer networks

First-principles design of a half-filled flat band of the kagome lattice in two-dimensional metal-organic frameworks

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