Journal
NANO LETTERS
Volume 13, Issue 6, Pages 2842-2845Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl401147u
Keywords
Topological insulator; organometallic framework; Dirac band; flat band
Categories
Funding
- NSF-MRSEC [DMR-1121252]
- US DOE-BES [DE-FG02-04ER46148]
- ARL [W911NF-12-2-0023]
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Topological insulators (TI) are a class of materials exhibiting unique quantum transport properties with potential applications in spintronics and quantum computing. To date, all of the experimentally confirmed TIs are inorganic materials. Recent theories predicted the possible existence of organic TIs (OTI) in two-dimensional (2D) organometallic frameworks. However, those theoretically proposed structures do not naturally exist and remain to be made in experiments. Here, we identify a recently experimentally made 2D organometallic framework, consisting of pi-conjugated nickel-bis-dithiolene with a chemical formula Ni3C12S12, which exhibits nontrivial topological states in both a Dirac band and a flat band, therefore confirming the existence of OTI.
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