Bis(phthalocyaninato)yttrium grown on Au(111): Electronic structure of a single molecule and the stability of two-dimensional films investigated by scanning tunneling microscopy/spectroscopy at 4.8 K

Yanfeng Zhang, Pengfei Guan, Hironari Isshiki, Mingwei Chen, Masahiro Yamashita, Tadahiro Komeda

研究成果: Article査読

12 被引用数 (Scopus)

抄録

Scanning tunneling microscopy/spectroscopy (STM/STS) at 4.8 K has been used to examine the growth of a double-decker bis(phthalocyaninato)yttrium (YPc2) molecule on a reconstructed Au(111) substrate. Local differential conductance spectra (dI/dV) of a single YPc2 molecule allow the characteristics of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) to be identified. Furthermore, lateral distributions of the local density of states (LDOS) have also been obtained by dI/dV mapping and confirmed by first principles simulations. These electronic feature mappings and theoretical calculations provide a basis for understanding the unique STM morphology of YPc2, which is usually imaged as an eight-lobed structure. In addition, we demonstrate that bias-dependent STM morphologies and simultaneous dI/dV maps can provide a way of understanding the stability of two-dimensional YPc2 films.

本文言語English
ページ(範囲)604-611
ページ数8
ジャーナルNano Research
3
8
DOI
出版ステータスPublished - 2010

ASJC Scopus subject areas

  • 材料科学(全般)
  • 電子工学および電気工学

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