Electron energy-loss and soft X-ray emission spectroscopy of electronic structure of MgB 4

Yohei Sato, Taiki Saito, Kohei Tsuchiya, Masami Terauchi, Hiroki Saito, Masatoshi Takeda

Research output: Contribution to journalArticlepeer-review

Abstract

The electronic structure of MgB 4 , with the characteristic crystal structure comprising one-dimensional pentagonal B 6 cluster chain, was investigated using electron energy-loss spectroscopy and soft X-ray emission spectroscopy based on transmission electron microscopy. The dielectric function and density of state of unoccupied and occupied states were clarified experimentally for the first time. Although theoretical calculations has predicted MgB 4 to be a semiconductor, the electron energy-loss spectrum in this study show a plasmon peak at 0.4 eV, which might be due to carrier electrons. Theoretical calculations suggested that the electronic states near the Fermi energy are localized along the one dimensional B 6 cluster chain. Therefore, one–dimensional electric conductivity is expected.

Original languageEnglish
Pages (from-to)58-62
Number of pages5
JournalJournal of Solid State Chemistry
Volume253
DOIs
Publication statusPublished - 2017 Sep 1

Keywords

  • Boron cluster
  • DFT calculation
  • Electron energy-loss spectroscopy
  • Metal borides
  • Soft X-ray emission spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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