Initial adsorption and kondo resonance of 5,10,15,20-tetrakis(4- bromophenyl)porphyrin-co molecules on ag/si(111) surface studied by low-temperature scanning tunneling microscopy/spectroscopy

Qing Li, Shiro Yamazaki, Toyoaki Eguchi, Howon Kim, Se Jong Kahng, Jing Feng Jia, Qi Kun Xue, Yukio Hasegawa

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    6 Citations (Scopus)

    Abstract

    The initial adsorption and subsequent Kondo resonance of spin-active 5,10,15,20-tetrakis(4-bromophenyl)porphyrin-Co (TBrPP-Co) molecules on a Si(111)-√3×3√ Ag surface have been studied using low-temperature scanning tunneling microscopy/spectroscopy (STM/S). Different from the case on the Cu(111) surface, all the isolated single TBrPP-Co molecules are anchored in a planar conformation with a slight distortion via their four Br atoms bonding with the Ag atoms of the reconstructed surface structure. The Kondo resonance was also successfully observed above the isolated single molecules adsorbed on the metallic surface. Since the semiconducting Si do not have electronic states at the Fermi level, only the surface state electrons contribute to the observed Kondo resonance.

    Original languageEnglish
    Article number08JB01
    JournalJapanese journal of applied physics
    Volume48
    Issue number8 PART 3
    DOIs
    Publication statusPublished - 2009 Aug

    ASJC Scopus subject areas

    • General Engineering
    • General Physics and Astronomy

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