Dichotomy between frustrated local spins and conjugated electrons in a two-dimensional metal-organic framework

Jiang, Wei1,2; Liu, Zheng3; Mei, Jia-Wei4,5; Cui, Bin6; Liu, Feng1

2019-01-21

10.1039/c8nr08479c

Nanoscale   影响因子和分区

2040-3364

2040-3372

Dichotomy between local spins and conjugated electrons spawns various exotic physical phenomena, however, it has mostly been reported in three-dimensional (3D) inorganic systems. We show, for the first time, that a rare 2D metal-organic framework exhibits intriguing dichotomy behavior, which can be directly identified through scanning tunneling microscopy/spectroscopy (STM/STS). In a newly synthesized Cu-hexaiminobenzene [Cu-3(HAB)(2)], on the one hand, the Cu2+ ions form an ideal S - 1/2 antiferromagnetic (AFM) kagome lattice; on the other hand, the conjugated-electrons from the organic ligands produce a frustrated (x,y) model on a honeycomb lattice, giving rise to completely dispersionless energy bands around the Fermi level that favour the ferromagnetic (FM) state. Remarkably, the frustrated local spins and conjugated electrons interact through a strong FM Hund's coupling, giving rise to a wide range of intriguing quantum phases. Furthermore, we propose that this dichotomy can be directly characterized through STM/STS measurements due to its special 2D nature, which provides a unique exciting platform to investigate the dichotomy of frustrated spins and electrons in a single lattice.

SCI ; EI

英语

通讯

NSFC[11774196]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000460162900015

ROYAL SOC CHEMISTRY

20190406408139

Crystalline materials ; Electrons ; Honeycomb structures ; Organometallics ; Scanning tunneling microscopy

Structural Members and Shapes:408.2 ; Organic Compounds:804.1 ; Organic Polymers:815.1.1 ; Crystalline Solids:933.1

Web of Science

1.Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA
2.Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA
3.Tsinghua Univ, Inst Adv Study, Beijing 100084, Peoples R China
4.Southern Univ Sci & Technol, Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
5.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
6.Shandong Univ, Sch Phys, Jinan 250100, Peoples R China

Jiang, Wei,Liu, Zheng,Mei, Jia-Wei,et al. Dichotomy between frustrated local spins and conjugated electrons in a two-dimensional metal-organic framework[J]. Nanoscale,2019,11(3):955-961.

Jiang, Wei,Liu, Zheng,Mei, Jia-Wei,Cui, Bin,&Liu, Feng.(2019).Dichotomy between frustrated local spins and conjugated electrons in a two-dimensional metal-organic framework.Nanoscale,11(3),955-961.

Jiang, Wei,et al."Dichotomy between frustrated local spins and conjugated electrons in a two-dimensional metal-organic framework".Nanoscale 11.3(2019):955-961.