首页|Uncovering the magnetic response of open-shell graphene nanostructures on metallic surfaces at different doping levels

Uncovering the magnetic response of open-shell graphene nanostructures on metallic surfaces at different doping levels

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Open-shell graphene nanostructures(GNs)are promising candidates for future spintronics and quantum technologies.Recent progress based on on-surface synthetic approach has successfully created such GNs on metallic surfaces.Meanwhile,the doping effect of metallic surfaces is inevitably present and can significantly tune their electronic and magnetic properties.Here,we investigate the zigzag end states of open-shell 7-armchair graphene nanoribbons(7-AGNRs)on Au(111),Au(100)and Ag(111)surfaces.Combined with the manipulation of a scanning tunneling microscope,we demonstrate that the end states can be tuned from empty states to singly occupied states and to doubly occupied states by substrate doping.Furthermore,the singly occupied states can be finely tuned,with the occupancy number of the states and related magnetic behaviors uncovered by experiments at different temperatures and magnetic fields.Our results provide a comprehensive study of the magnetic response of open-shell GNs on metallic surfaces at different doping levels.

open-shell graphene nanostructuresmagnetic responsemetallic substrate dopingKondo resonancescanning tunneling microscopy/spectroscopy

Zengfu Ou、Jun Wang、Jihai Zhang、Yukang Ding、Shenwei Chen、Wenya Zhai、Jingcheng Li、Dingyong Zhong、Donghui Guo

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School of Physics,Sun Yat-sen University Guangzhou 510275,China

Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices,School of Physics,Sun Yat-sen University,Guangzhou 510275,China

State Key Laboratory of Optoelectronic Materials and Technologies,Sun Yat-sen University Guangzhou 510275,China

College of Chemical Engineering,Zhejiang University of Technology Hangzhou 310014,China

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Guangdong Major Project of Basic and Applied Basic ResearchNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaHundreds of Talents Program of Sun Yatsen University and Guangdong Science and Technology Project

2021B030103000211974431117744342021QN02X859

2024

10.1007/s11433-023-2261-2

中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
年,卷(期)：2024.67(2)
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