On-Surface Design of a 2D Cobalt-Organic Network Preserving Large Orbital Magnetic Moment

• DOI: 10.1021/jacs.2c05894
• Publication Date: 2022-08-25T22:00:30Z
• Authors: Cristina Martín-F...; Sofia O. Parreiras; José I. Urgel; Víctor Rubio-Giménez; Beatriz Muñiz Cano; Daniel Moreno; Koen Lauwaet; Manuel Valvidares; Miguel A. Valbuena; Pierluigi Gargiani; Wolfgang Kuch; Julio Camarero; José M. Gallego; Rodolfo Miranda; José I. Martínez; Carlos Martí-Gast...; David Écija
• Keywords: 500 Naturwissenschaften und Mathematik::530 Physik::539 Moderne Physik; X-Rays; Cobalt; Ligands; Quantum mechanics; 01 natural sciences; Fourier transforms; 0104 chemical sciences; Magnetics; Metals; 539; Magnetic properties; Density functional theory; Anisotropy; Scanning tunneling microscopy

The design of antiferromagnetic nanomaterials preserving large orbital magnetic moments is important to protect their functionalities against perturbations. Here, we exploit an archetype H6HOTP species for conductive metal-organic frameworks a Co-HOTP one-atom-thick architecture on Au(111) surface. Our multidisciplinary scanning probe microscopy, X-ray absorption spectroscopy, linear dichroism, and circular dichroism study, combined with density functional theory simulations, reveals the formation unique network based threefold Co+2 coordination deprotonated ligands, which displays moment effective spin ratio 0.8, in-plane easy axis magnetization, anisotropy. simulations suggest ground state, compatible experimental findings. Such exemplifies how on-surface chemistry can enable field-robust materials.