首页|Topological Defects Induced High-Spin Quartet State in Truxene-Based Molecular Graphenoids
Topological Defects Induced High-Spin Quartet State in Truxene-Based Molecular Graphenoids
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Topological defects in graphene materials introduce exotic properties with both fundamental impor-tance and technological implications,absent in their defect-free counterparts.Although individual topo-logical defects have been widely studied,collective magnetic behaviors originating from well-organized multiple topological defects remain a great chal-lenge.Here,we examined the collective magnetic properties originating from three pentagon topo-logical defects in truxene-based molecular graphe-noids using scanning tunneling microscopy(STM)and non-contact atomic force microscopy.Unpairedπ electrons were introduced into the aromatic topol-ogy of truxene molecular graphenoids one by one by dissociating hydrogen atoms at the pentagon defects via atom manipulation.STM measurements,together with density functional theory calculations,suggested that the unpaired electrons were ferro-magnetically coupled,forming a collective high-spin quartet state of S=3/2.Our work demonstrates that collective spin ordering could be realized through engineering regular patterned topological defects in molecular graphenoids,providing a new platform for designing one-dimensional ferromagnet-ic spin chains and two-dimensional ferromagnetic networks.
π electron magnetismSTM/nc-AFMhigh-spin moleculesatom manipulationsurface chemistry
Can Li、Yu Liu、Yufeng Liu、Fu-Hua Xue、Dandan Guan、Yaoyi Li、Hao Zheng、Canhua Liu、Jinfeng Jia、Pei-Nian Liu、Deng-Yuan Li、Shiyong Wang
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Key Laboratory of Artificial Structures and Quantum Control,Ministry of Education,Shenyang National Laboratory for Materials Science,School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240
Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center,Frontiers Science Center for Materi-obiology and Dynamic Chemistry,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237
Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai 200240
Shanghai Research Center for Quantum Sciences,Shanghai 201315
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国家重点研发计划国家自然科学基金国家自然科学基金Shanghai Municipal Science and Technology Qi Ming Xing ProjectFok Ying Tung Foundation for young researchers and SJTU科技部项目科技部项目科技部项目国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金中国科学院战略规划重点项目上海市科委项目上海市科委项目上海市科委项目上海市科委项目
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