Discovery of intrinsic quantum anomalous Hall effect in organic Mn-DCA lattice

Wang, Yaping; Ji, Wei-xiao; Zhang, Chang-wen; Li, Ping; Wang, Pei-ji; Kong, Biao; Li, Sheng-shi; Shen, Yan; Liang, Kang

doi:10.1063/1.4985144

Cited by 61 publications

(22 citation statements)

References 43 publications

(42 reference statements)

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“…4b. In line with the calculations done for DCA 3 Cu 2 and DCA 3 Mn 2 MOFs [7,9], the band structure of DCA 3 Co 2 MOF has a number of flat-bands and Dirac cones. While the antiferromagnetic structure is slightly After subtracting the reference dI/dV spectrum (green curve) recorded on G/Ir(111) surface, we extract the spectrum on Cobalt (red curve).…”

Section: Figure 3asupporting

confidence: 65%

Two-Dimensional Band Structure in Honeycomb Metal–Organic Frameworks

et al. 2018

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Two-dimensional (2D) metal–organic frameworks (MOFs) have been recently proposed as a flexible material platform for realizing exotic quantum phases including topological and anomalous quantum Hall insulators. Experimentally, direct synthesis of 2D MOFs has been essentially confined to metal substrates, where the strong interaction with the substrate masks the intrinsic electronic properties of the MOF. In addition to electronic decoupling from the underlying metal support, synthesis on weakly interacting substrates (e.g., graphene) would enable direct realization of heterostructures of 2D MOFs with inorganic 2D materials. Here, we demonstrate synthesis of 2D honeycomb MOFs on epitaxial graphene substrate. Using low-temperature scanning tunneling microscopy (STM) and atomic force microscopy (AFM) complemented by density-functional theory (DFT) calculations, we show the formation of a 2D band structure in the MOF decoupled from the substrate. These results open the experimental path toward MOF-based designer electronic materials with complex, engineered electronic structures.

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Section: Figure 3asupporting

confidence: 65%

Two-Dimensional Band Structure in Honeycomb Metal–Organic Frameworks

et al. 2018

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“…The search for a new member of the Dirac SGS family with the QAHE is of great importance for both fundamental interest and practical applications. Also, QSHE has been reported in previously studies 25,36 . The layered crystals of transition-metal trichloride, and the family of layered materials with the general formula TMX 3 (TM = Ti, V, Cr, Fe, Mo, Ru, Rh, Ir) and X is a halogen anion (X = Cl, Br, I) have become of interest for this purpose.…”

supporting

confidence: 55%

“…Too weak electronic correlations is an important problem in these 2DM in order to drive magnetism and to break TRS. Although, 2D Kagome lattices could potentially exhibit the QAHE, the nontrivial band gaps of these materials are too small and impede the observation of QAHE 17,25,26 .…”

mentioning

confidence: 99%

Dirac half-metallicity of Thin PdCl3 Nanosheets: Investigation of the Effects of External Fields, Surface Adsorption and Defect Engineering on the Electronic and Magnetic Properties

Bafekry

Stampfl

Peeters

2020

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pdcl 3 belongs to a novel class of Dirac materials with Dirac spin-gapless semiconducting characteristics. In this paper based, on first-principles calculations, we have systematically investigated the effect of adatom adsorption, vacancy defects, electric field, strain, edge states and layer thickness on the electronic and magnetic properties of pdcl 3 (palladium trichloride). Our results show that when spinorbital coupling is included, PdCl 3 exhibits the quantum anomalous Hall effect with a non-trivial band gap of 24 meV. With increasing number of layers, from monolayer to bulk, a transition occurs from a Dirac half-metal to a ferromagnetic metal. On application of a perpendicular electrical field to bilayer pdcl 3 , we find that the energy band gap decreases with increasing field. Uniaxial and biaxial strain, significantly modifies the electronic structure depending on the strain type and magnitude. Adsorption of adatom and topological defects have a dramatic effect on the electronic and magnetic properties of pdcl 3. In particular, the structure can become a metal (Na), half-metal (Be,

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“…To conrm the MFA results above, the T C of Fe (z 2 ) was further determined using Monte Carlo (MC) simulations as it has the lowest T C among the calculated T C s above RT. These simulations are used to evaluate the stability of 2D magnetic semiconducting [60][61][62] or conducting 43,63 systems.…”

Section: Transition Temperaturementioning

confidence: 99%