journal article·2019-09-24Open access

Switching the Spin on a Ni Trimer within a Metal–Organic Motif by Controlling the On-Top Bromine Atom

Lei Xie, Haiping Lin, Chi Zhang, Jingcheng Li, Nestor Merino-Díez, Niklas Friedrich, Xavier Bouju, Youyong Li, Jose Ignacio Pascual, Wei Xu

ACS Nano· Volume 13· Issue 9

Abstract

Controlling the spin of metal atoms embedded in molecular systems is a key step toward the realization of molecular electronics and spintronics. Many efforts have been devoted to explore the influencing factors dictating the survival or quenching of a magnetic moment in a metal–organic molecule, and among others, the spin control by axial ligand attachments is the most promising. Herein, from the interplay of high-resolution scanning tunneling microscopy imaging/manipulation and scanning tunneling spectroscopy measurements together with density functional theory calculations, we successfully demonstrate that a Ni trimer within a metal–organic motif acquires a net spin promoted by the adsorption of an on-top Br atom. The spin localization in the trimetal centers bonded to Br was monitored via the Kondo effect. The removal of the Br ligand resulted in the switch from a Kondo ON to a Kondo OFF state. The magnetic state induced by the Br ligand is theoretically attributed to the enhanced Br 4pz and Ni 3dz2 states due to the charge redistribution. The manipulation strategy reported here provides the possibility to explore potential applications of spin-tunable structures in spintronic devices.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Quantum and electron transport phenomena · Molecular Junctions and Nanostructures · Magnetism in coordination complexes

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Interdisciplinary Materials Research Center, College of Materials Science and Engineering, Tongji University, Shanghai 201804, People’s Republic of China

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren’ai Road, Suzhou 215123, Jiangsu, People’s Republic of China

CIC nanoGUNE, 20018 San Sebastián-Donostia, Spain

Donostia International Physics Center (DIPC), 20018 San Sebastián-Donostia, Spain

CEMES-CNRS, Université de Toulouse, 31000 Toulouse, France

Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain

Funding

State Administration of Foreign Experts Affairs · Ministry of Education of the People's Republic of China · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions · Collaborative Innovation Center of Suzhou Nano Science & Technology · Agencia Estatal de Investigaci?n

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