Photoacoustic Spectrum in Superionic Conductors Ag_3SI and AgI : Optical Properties of Condensed Matter

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概要

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• The photoacoustic spectrum P(λ) of the superionic conductors β-Ag_3SI and αAg_3SI has been measured in the range 270≦λ≦1800 nm at room temperature, A difference in the band gap is observed in each specimen; in the annealed β-phase and in the quenched α-phase. These data can be interpreted on the basis of a simple band model in which Pantelides has shown that the band gap varies approximately with an equilibrium nearest-neighbor distance, d, as d^<-2>. As a result, Ag_3SI (E_g(β)=1.11 eV and E_g(α)=1.47 eV) is found to have a small band gap in comparison with γ-AgI (E_g=2.85 eV). Therefore, Ag_3SI resembles a semiconductor and the electrons make a large contribution to the conductivity in comparison with AgI.

• 社団法人応用物理学会の論文
• 1988-10-20

著者

• Akao Fumio

  Department Of Electronic Engineering Okayama University Of Science

• Nakagawa Kimio

  Department Of Electronic Engineering Okayama University Of Science

• KURITA Mitsufumi

  Graduate School of Science, Department of Electronic Engineering, Okayama University of Science

• Kurita M

  Tanaka Kikinzoku Kogyo Kk Kanagawa Jpn

• Kurita Mitsufumi

  Graduate School Of Science Department Of Electronic Engineering Okayama University Of Science

関連論文

• Contribution of the Si s Electronic State to the Density of State of CoSi_2 at Fermi Energy by Soft X-Ray Emission Spectroscopy
• Fundamental Absorption Edge of α-AgI-type Supersonic Conductor Ag_3SBr
• Study of Sensitization Processes in Superionic Conductor α-AgI by Photoacoustic Spectroscopy (I)
• Photoacoustic Spectrum in Superionic Conductors Ag_3SI and AgI : Optical Properties of Condensed Matter

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