論文

査読有り
2020年3月

Structural, Electronic, and Magnetic Properties of Cobalt Tetrakis (Thiadiazole) Porphyrazine Molecule Films on Au(111)

ACS OMEGA
  • Yu Wang
  • ,
  • Jie Hou
  • ,
  • Keitaro Eguchi
  • ,
  • Chihiro Nanjo
  • ,
  • Tsuyoshi Takaoka
  • ,
  • Yasuyuki Sainoo
  • ,
  • Kunio Awaga
  • ,
  • Tadahiro Komeda

5
12
開始ページ
6676
終了ページ
6683
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acsomega.9b04453
出版者・発行元
AMER CHEMICAL SOC

We investigated the structural and electronic/spin configurations of a film of the Co tetrakis(1,2,5-thiadiazole) porphyrazine (CoTTDPz) molecule adsorbed on the Au(111) surface by a scanning tunneling microscope (STM). CoTTDPz has a structure similar to that of the Co phthalocyanine molecule, but the benzene ring of the isoindole of the phthalocyanine molecule is replaced by the pentagon moiety of 1,2,5-thiadiazoles that has an S atom at the apex. We find an ordered molecular lattice with a threefold symmetry where a nearest-neighbor distance of 1.30 nm was measured, which is significantly smaller than that observed for the metal Pc molecule. The unit cell of the lattice contains two molecules that are rotated by 60 degrees relative to each other. With the configuration achieved by this rotation, the neighboring molecules can form a stronger interaction through bonding between the S atom at the apex of one molecule and the N atom of the other (the N atom that is bridging the thiadiazoles). The strong interaction between the molecule and the substrate appears in the spin state examined by the detection of the Kondo resonance, which is formed by the screening of an isolated spin by the conduction electron. Even though the existence of the spin was confirmed for the bulk and thick films of this molecule, no Kondo features are detected for the molecules in the first, second, and third layers of the films. However, the isolated molecule in the third layer showed an intriguing combination of the Kondo feature and an inelastic excitation feature caused by a spin-flip process.

リンク情報
DOI
https://doi.org/10.1021/acsomega.9b04453
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000523299700047&DestApp=WOS_CPL
ID情報
  • DOI : 10.1021/acsomega.9b04453
  • ISSN : 2470-1343
  • Web of Science ID : WOS:000523299700047

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