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Updated: Mar 25, 2026
Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Spin-polarized Dirac cones and topological nontriviality in a metal-organic framework Ni2C24S6H12
Lin Wei1, Xiaoming Zhang2, Mingwen Zhao2
1School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, Shandong, China. zmw@sdu.edu.cn and School of Information Science and Engineering, Shandong University, Jinan 250100, Shandong, China.
Abstract:
Dirac cones in the band structure make a great contribution to the unique electronic properties of graphene. But the spin-degeneracy of Dirac cones limits the application of graphene in spintronics. Here, using first-principles calculations, we propose a two-dimensional (2D) metal-organic framework (MOF), Ni2C24S6H12, with spin-polarized Dirac cones at the six corners of the Brillouin zone (BZ). Ferromagnetism is quite stable with a high Curie temperature (630 K) as revealed by Monte Carlo simulation within the Ising model. Taking spin-orbit coupling into account, band gaps are opened up at the Dirac point (5.9 meV) and Γ point (10.4 meV) in the BZ, making Ni2C24S6H12 a Chern topological insulator which is implemented for achieving the quantum anomalous Hall effect. These interesting properties enable Ni2C24S6H12 to be a promising candidate material for spintronics device applications.
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