Quantum Anomalous Hall Effect in 2D Organic Topological Insulators
Abstract
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.
- Publication:
-
Physical Review Letters
- Pub Date:
- May 2013
- DOI:
- 10.1103/PhysRevLett.110.196801
- arXiv:
- arXiv:1302.1088
- Bibcode:
- 2013PhRvL.110s6801W
- Keywords:
-
- 73.43.-f;
- 72.20.-i;
- 72.80.Le;
- 81.05.Fb;
- Quantum Hall effects;
- Conductivity phenomena in semiconductors and insulators;
- Polymers;
- organic compounds;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 5 pages, 4 figures