Measurement of phonon energy of Sb2Te3 by scanning tunneling microscope light-emission spectroscopy

Y. Uehara, M. Kuwahara, S. Katano

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We have measured the energy of the A2u phonon mode of Sb 2Te3 by scanning tunneling microscope light-emission (STM-LE) spectroscopy combined with ps-pulsed laser irradiation of the STM tip-sample gap. It is known that the STM-LE from Sb2Te3 is excited by electronic transitions at a photon energy of around 1.6 eV, i.e, a single peak with a narrow spectral width appears at the photon energy in the STM-LE spectrum. For STM-LE occurring with the STM tip-sample gap irradiated by ps laser pulses, several supplementary peaks appear in the STM-LE spectra (in addition to the single original peak). The difference in energy between adjacent peaks gives the phonon energy of the A2u mode of Sb 2Te3.

Original languageEnglish
Pages (from-to)29-32
Number of pages4
JournalSolid State Communications
Volume177
DOIs
Publication statusPublished - 2014

Keywords

  • Chalcogenide alloys
  • Light-emission spectroscopy
  • STM
  • Vibrational spectroscopy

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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