Infrared Phonons in Semiconducting Phase of BaPb_<1-x>Bi_xO_3

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概要

• 論文の詳細を見る

• Infrared reflectivity spectra of BaPb. .Bi.0, alloys in their semiconducting phase(,XI'>0.4) are presented. Four optical phonon bands are clearly observed in the reflec-tivity spectrum of Basic,. It is found that the oscillator stre?tgth of one phononmode remarkably decreases with increase of the Pb composition. This provides astrong evidence for the charge disproportionation which leads to the formation of asuperlattice of alternating inequivalent Bi sites in Basic,. It is suggested that themacroscopic formation of such Bi superlattice is also responsible for the semiconduc-ting properties of alloys. Based on the experimental observations the nature of themetal-semiconductor transition of this system is discussed.

• 社団法人日本物理学会の論文
• 1985-11-15

著者

• SUGAI Shunji

  Department of Physics,Faculty of Science,Osaka University

• TAJIMA Setsuko

  Department of Physics, Graduate School of Science, Osaka University

• KITAZAWA Koichi

  Department of Industrial Chemistry, University of Tokyo

• TANAKA SHOJI

  Department of Impairment Study, Graduate Course of Rehabilitation Science, Division of Health Scienc

• Sugai S

  Tokyo Inst. Technol. Tokyo Jpn

• Sugai S

  Department Of Physics Nagoya University

• Sugai Shunji

  Department Of Physics Division Of Material Science Nagoya University

• Tajima Setsuko

  Department Of Applied Physics The University Of Tokyo

• Tajima S

  International Superconductivity Tech. Center Tokyo

• UCHIDA Shin-ichi

  Department of Applied Physics,University of Tokyo

• Tanaka Shoji

  Department Of Applied Physics Waseda University

• Kitazawa K

  Univ. Tokyo Tokyo

• Kitazawa Koichi

  Department Of Superconductivity University Of Tokyo

• Kitazawa Koichi

  Department Of Advanced Materials Science University Of Tokyo

• Masaki Atsushi

  Research Division The Green Cross Corporation

• Masaki Atsushi

  Department Of Applied Physics Univetsity Of Tokyo

• Masuhara A

  Institute For Multidisciplinary Research For Advanced Materials Tohoku University

• Uchida Shin-ichi

  Department Of Applied Physics University Of Tokyo

• Tanaka Shoji

  Department Of Applied Physics Faculty Of Engineering University Of Tokyo

• Tanaka Shoji

  Department Of Applied Physics Faculty Fo Engineering University Of Tokyo

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