Quantum anomalous Hall effect in 2D organic topological insulators

The quantum anomalous Hall effect (QAHE) is a fundamental transport phenomenon in the field of condensed-matter physics. Without an external magnetic field, spontaneous magnetization combined with spin-orbit coupling gives rise to a quantized Hall conductivity. So far, a number of theoretical propos...

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Bibliographic Details
Published in:Physical review letters 2013-05, Vol.110 (19), p.196801-196801, Article 196801
Main Authors: Wang, Z F, Liu, Zheng, Liu, Feng
Format: Article
Language:English
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Summary:The quantum anomalous Hall effect (QAHE) is a fundamental transport phenomenon in the field of condensed-matter physics. Without an external magnetic field, spontaneous magnetization combined with spin-orbit coupling gives rise to a quantized Hall conductivity. So far, a number of theoretical proposals have been made to realize the QAHE, but all based on inorganic materials. Here, using first-principles calculations, we predict a family of 2D organic topological insulators for realizing the QAHE. Designed by assembling molecular building blocks of triphenyl-transition-metal compounds into a hexagonal lattice, this new class of organic materials is shown to have a nonzero Chern number and exhibits a gapless chiral edge state within the Dirac gap.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.110.196801