Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.106804
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Funding
- DOE-BES [DE-FG02-04ER46148]
- NSF-MRSEC [DMR-1121252]
- ARL
- Swiss National Funds
- U.S. NSF [PHY-0756958]
- [W911NF-12-2-0023]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1068558] Funding Source: National Science Foundation
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By combining exotic band dispersion with nontrivial band topology, an interesting type of band structure, namely, the flat Chern band, has recently been proposed to spawn high-temperature fractional quantum Hall states. Despite the proposal of several theoretical lattice models, however, it remains doubtful whether such a romance of flatland'' could exist in a real material. Here, we present a first-principles design of a two-dimensional indium-phenylene organometallic framework that realizes a nearly flat Chern band right around the Fermi level by combining lattice geometry, spin-orbit coupling, and ferromagnetism. An effective four-band model is constructed to reproduce the first-principles results. Our design, in addition, provides a general strategy to synthesize topologically nontrivial materials by virtue of organic chemistry and nanotechnology. DOI: 10.1103/PhysRevLett.110.106804
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