Discovery of Intrinsic Quantum Anomalous Hall Effect in Organic Mn-DCA Lattice
arXiv:1705.09013 · doi:10.1063/1.4985144
Abstract
The quantum anomalous Hall (QAH) phase is a novel topological state of matter characterized by a nonzero quantized Hall conductivity without an external magnetic field. The realizations of QAH effect, however, are experimentally challengeable. Based on ab initio calculations, here we propose an intrinsic QAH phase in DCA Kagome lattice. The nontrivial topology in Kagome bands are confirmed by the nonzero chern number, quantized Hall conductivity, and gapless chiral edge states of Mn-DCA lattice. A tight-binding (TB) model is further constructed to clarify the origin of QAH effect. Furthermore, its Curie temperature, estimated to be ~ 253 K using Monte-Carlo simulation, is comparable with room temperature and higher than most of two-dimensional ferromagnetic thin films. Our findings present a reliable material platform for the observation of QAH effect in covalent-organic frameworks.
arXiv comment9 pages,4 figures
References in corpus (22)
- Topological Insulators
- Quantum Spin Hall Effect in Graphene
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- Maximally-localized generalized Wannier functions for composite energy bands
- Anomalous Hall effect
- Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
- Maximally-localized Wannier functions for entangled energy bands
- Quantum Spin Hall Effect
- Valley-Polarized Metals and Quantum Anomalous Hall Effect in Silicene
- First Principles Calculation of Anomalous Hall Conductivity in Ferromagnetic bcc Fe
- Quantum Anomalous Hall Effect in Graphene from Rashba and Exchange Effects
- Trajectory of Anomalous Hall Effect toward the Quantized State in a Ferromagnetic Topological Insulator
- Proximity-induced ferromagnetism in graphene revealed by anomalous Hall effect
- Quantum Anomalous Hall Effect in Graphene Proximity Coupled to an Antiferromagnetic Insulator
- Quantum Anomalous Hall Effect in 2D Organic Topological Insulators
- Organic Topological Insulators in Organometallic Lattices
- Flat Chern Band in a Two-Dimensional Organometallic Framework
- Sign Changes of Intrinsic Spin Hall Effect in Semiconductors and Simple Metals: First-Principles Calculations
- Two-Dimensional Arsenene Oxide: A Realistic Large-gap Quantum Spin Hall Insulator
- Topological States in Ferromagnetic CdO/EuO Superlattices and Quantum Wells
- Two-Dimensional Group-IV Chalcogenide Si2Te2 film: A New Quantum Spin Hall Insulator with Sizable Band Gap
- Tunable Topological States in Electron-Doped HTT-Pt