Scanning tunneling microscope light emission spectra of polycrystalline Ge2 Sb2 Te5 and Sb2 Te3

Y. Uehara, M. Kuwahara, S. Katano, S. Ushioda

研究成果: Article査読

4 被引用数 (Scopus)

抄録

We have observed scanning tunneling microscope light emission (STM-LE) spectra of Ge2Sb2Te5 and Sb2Te3. Although these chalcogenide alloys exhibit band gaps less than 0.5 eV, the STM-LE was observed with a narrow spectral width at a photon energy of 1.5 eV for both materials. By analyzing its bias voltage, polarity, and temperature dependencies combined with recently reported theoretical electronic structures, we concluded that the STM-LE is excited by electronic transitions taking place in the local electronic structure having a direct gap-like shape with a band gap of 1.5 eV, commonly found in the electronic structures of both materials.

本文言語English
ページ(範囲)1902-1904
ページ数3
ジャーナルSolid State Communications
149
43-44
DOI
出版ステータスPublished - 2009 11

ASJC Scopus subject areas

  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学

フィンガープリント

「Scanning tunneling microscope light emission spectra of polycrystalline Ge<sub>2</sub> Sb<sub>2</sub> Te<sub>5</sub> and Sb<sub>2</sub> Te<sub>3</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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