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Abstract
This study investigates the novel spin behavior of vanadyl tetrakis(thiadiazole) porphyrazine (VOTTDPz) molecules adsorbed on Au(111). By replacing the inert phthalocyanine ligand with a reactive thiadiazole moiety, the molecule-molecule interaction is enhanced. Scanning tunneling spectroscopy (STS) reveals Kondo resonance features, showing site-dependent variations in shape and intensity, indicating complex spin-spin interactions. Two distinct molecular arrangements (phases I and II) are observed, with phase II exhibiting alternating VO-up and VO-down molecules leading to ferromagnetic (FM) and antiferromagnetic (AFM) couplings, influencing the Kondo resonance.
Publisher
Communications Chemistry
Published On
Mar 20, 2020
Authors
Jie Hou, Yu Wang, Keitaro Eguchi, Chihiro Nanjo, Tsuyoshi Takaoka, Yasuyuki Sainoo, Ryuichi Arafune, Kunio Awaga, Tadahiro Komeda
Tags
vanadyl tetrakis(thiadiazole) porphyrazine
Au(111)
Kondo resonance
spin behavior
molecule-molecule interaction
ferromagnetic coupling
antiferromagnetic coupling
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