Design and Synthesis of a Single-Layer Ferromagnetic Metal- Organic Framework with Topological Nontrivial Gaps

Gao，Zi'Ang1; Gao，Yifan1,2; Hua，Muqing1; Liu，Jing1; Huang，Li2; Lin，Nian1

2020-12-10

10.1021/acs.jpcc.0c08140

Journal of Physical Chemistry C   影响因子和分区

1932-7447

1932-7455

We report on the design and synthesis of a two-dimensional metal-organic framework Fe-3(HITP)(2) which comprises of a Kagome sublattice of Fe atoms. Density-functional theory calculations reveal that this framework has a ferromagnetic ground state with several topological nontrivial gaps opened due to the spin-orbit coupling, signifying quantum anomalous Hall features. Experimentally, we synthesize this structure by means of on-surface coordination self-assembly on an Au(111) substrate. We resolve its structure at a single-molecule resolution using scanning tunneling microscopy and confirm that the on-surface structure is nearly identical to the free-standing framework. We use scanning tunneling spectroscopy to study its electronic properties. A zero-bias resonance localized at the Fe atoms indicates that a magnetic moment is present at the Kagome lattice. Our results demonstrate the viability of realizing 2D organic quantum anomalous Hall systems.

SCI ; EI

英语

其他

Hong Kong RGC[16300118] ; National Natural Science Foundation of China[11774142] ; Shenzhen Basic Research Fund["JCYJ20170817105132549","JCYJ20180504165817769","JCYJ20170817105201098"]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000599610500051

AMER CHEMICAL SOC

20205209668465

Ground state ; Organometallics ; Density functional theory ; Ferromagnetism ; Crystalline materials ; Electronic properties ; Surface structure ; Magnetic moments ; Quantum theory ; Scanning tunneling microscopy ; Topology

Magnetism: Basic Concepts and Phenomena:701.2 ; Magnetic Materials:708.4 ; Organic Compounds:804.1 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Probability Theory:922.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4 ; Crystalline Solids:933.1

Web of Science

1.Department of Physics,The Hong Kong University of Science and Technology,Hong Kong
2.Department of Physics,Southern University of Science and Technology,Shenzhen, Guangdong,518055,China

Gao，Zi'Ang,Gao，Yifan,Hua，Muqing,et al. Design and Synthesis of a Single-Layer Ferromagnetic Metal- Organic Framework with Topological Nontrivial Gaps[J]. Journal of Physical Chemistry C,2020,124(49).

Gao，Zi'Ang,Gao，Yifan,Hua，Muqing,Liu，Jing,Huang，Li,&Lin，Nian.(2020).Design and Synthesis of a Single-Layer Ferromagnetic Metal- Organic Framework with Topological Nontrivial Gaps.Journal of Physical Chemistry C,124(49).

Gao，Zi'Ang,et al."Design and Synthesis of a Single-Layer Ferromagnetic Metal- Organic Framework with Topological Nontrivial Gaps".Journal of Physical Chemistry C 124.49(2020).