Determining the phonon energy of highly oriented pyrolytic graphite by scanning tunneling microscope light emission spectroscopy

Yoichi Uehara, Junichi Michimata, Shota Watanabe, Satoshi Katano, Takeshi Inaoka

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We have investigated the scanning tunneling microscope (STM) light emission spectra of isolated single Ag nanoparticles lying on highly oriented pyrolytic graphite (HOPG). The STM light emission spectra exhibited two types of spectral structures (step-like and periodic). Comparisons of the observed structures and theoretical predictions indicate that the phonon energy of the ZO mode of HOPG [M. Mohr et al., Phys. Rev. B 76, 035439 (2007)] can be determined from the energy difference between the cutoff of STM light emission and the step in the former structure, and from the period of the latter structure. Since the role of the Ag nanoparticles does not depend on the substrate materials, this method will enable the phonon energies of various materials to be measured by STM light emission spectroscopy. The spatial resolution is comparable to the lateral size of the individual Ag nanoparticles (that is, a few nm).

本文言語English
論文番号104306
ジャーナルJournal of Applied Physics
123
10
DOI
出版ステータスPublished - 2018 3 14

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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