The Charged Defect Exists?

Abstract

The origin of gap states in chalcogenide glasses has been studied on the basis of optical spectra obtained for As2 S3 using photoluminescence, photothermal deflection, and (resonant) Raman scattering. These results combined with other observations suggest that the weak absorption tail arises from gap states below the conduction band, which are produced by As-As wrong bonds. The bond density is estimated at 1 at.%, which is much greater than that of the charged defect proposed by Mott et al. These insights imply that, not the charged defect, but the wrong bond governs electronic properties in covalent chalcogenide glasses.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2001
Accession Number
ADP011503

Entities

People

  • Kōichi Tanaka

Organizations

  • Hokkaido University

Tags

DTIC Thesaurus Topics

  • Absorption
  • Absorption Coefficients
  • Absorption Spectra
  • Advanced Materials
  • Atomic Structure
  • Conduction Bands
  • Energy Bands
  • Energy Levels
  • Fermi Levels
  • Optical Absorption
  • Optical Fibers
  • Optical Materials
  • Raman Scattering
  • Scattering
  • Spectra
  • Spectroscopy
  • Valence Bands

Fields of Study

  • Physics

Readers

  • Quantum Chemistry
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Statistical inference.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene