High energy-resolution electron energy-loss spectroscopy analysis of dielectric property and electronic structure of hexagonal diamond

Yohei Sato, Masami Terauchi, Wataru Inami, Akira Yoshiasa

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)

    Abstract

    Electron energy-loss spectroscopy measurements of a hexagonal diamond (h-DIA) were performed using a transmission electron microscope equipped with a monochromator. From the measurements, the dielectric function of h-DIA was derived using Kramers-Kronig analysis (KKA) for the first time. The results of KKA showed that the band gap energy of h-DIA was 4.2 eV, which is 1.3 eV smaller than that of a cubic diamond (c-DIA). The peak energies that appeared in the imaginary part of the dielectric function were assigned to the interband transition energies predicted by theoretical calculations. The K-shell excitation spectrum of h-DIA, which was apparently different from that of c-DIA, also showed good agreement with the reported theoretical prediction.

    Original languageEnglish
    Pages (from-to)40-44
    Number of pages5
    JournalDiamond and Related Materials
    Volume25
    DOIs
    Publication statusPublished - 2012 May

    Keywords

    • Band structure
    • Dielectric properties
    • Electron energy-loss spectroscopy
    • Hexagonal diamond
    • Optical properties

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Chemistry(all)
    • Mechanical Engineering
    • Materials Chemistry
    • Electrical and Electronic Engineering

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