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Vacancy-oxygen complex in Ge crystals

Markevich, VP; Litvinov, VV; Dobaczewski, L; Lindström, Lennart LU ; Murin, LI; Vetrov, SV; Hawkins, ID and Peaker, AR (2003) In Physica B: Condensed Matter 340. p.844-848
Abstract
Vacancy-oxygen (VO) complexes in Ge crystals have been studied by means of high-resolution infrared absorption and deep-level transient spectroscopy (Laplace DLTS) measurements. It is argued that the VO center in Ge has three charge states: double negative (VO--), single negative (VO-) and neutral (VO0) with the corresponding energy levels at E(- -/-) = E-c-0.21 eV and E(-/0) = E-v + 0.27 eV. Absorption lines at 716, 669 and 621 cm(-1) have been assigned to oxygen-related asymmetric stretching vibrations for the VO--, VO- and VO0 states, respectively. Isotope analogues of these lines were identified in O-18-doped Ge samples and studies of crystals containing mixtures of O-16 and O-18 confirm that the complex contains only one oxygen atom.... (More)
Vacancy-oxygen (VO) complexes in Ge crystals have been studied by means of high-resolution infrared absorption and deep-level transient spectroscopy (Laplace DLTS) measurements. It is argued that the VO center in Ge has three charge states: double negative (VO--), single negative (VO-) and neutral (VO0) with the corresponding energy levels at E(- -/-) = E-c-0.21 eV and E(-/0) = E-v + 0.27 eV. Absorption lines at 716, 669 and 621 cm(-1) have been assigned to oxygen-related asymmetric stretching vibrations for the VO--, VO- and VO0 states, respectively. Isotope analogues of these lines were identified in O-18-doped Ge samples and studies of crystals containing mixtures of O-16 and O-18 confirm that the complex contains only one oxygen atom. Laplace DLTS combined with uniaxial stress has been used to obtain information on the symmetry of the VO complex. It was found that the defect in VO-- state has orthorhombic-I symmetry (point group C-2v) as for the case of the VO in Si. (C) 2003 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
local vibrational modes, energy levels, Ge, vacancy-oxygen, symmetry
in
Physica B: Condensed Matter
volume
340
pages
844 - 848
publisher
Elsevier
external identifiers
  • wos:000188300200177
  • scopus:0347134654
ISSN
0921-4526
DOI
10.1016/j.physb.2003.09.227
language
English
LU publication?
yes
id
749ae1b4-f66b-4265-9f92-4f4d0ed2f6b0 (old id 288933)
date added to LUP
2007-09-18 07:15:35
date last changed
2018-06-24 04:34:03
@article{749ae1b4-f66b-4265-9f92-4f4d0ed2f6b0,
  abstract     = {Vacancy-oxygen (VO) complexes in Ge crystals have been studied by means of high-resolution infrared absorption and deep-level transient spectroscopy (Laplace DLTS) measurements. It is argued that the VO center in Ge has three charge states: double negative (VO--), single negative (VO-) and neutral (VO0) with the corresponding energy levels at E(- -/-) = E-c-0.21 eV and E(-/0) = E-v + 0.27 eV. Absorption lines at 716, 669 and 621 cm(-1) have been assigned to oxygen-related asymmetric stretching vibrations for the VO--, VO- and VO0 states, respectively. Isotope analogues of these lines were identified in O-18-doped Ge samples and studies of crystals containing mixtures of O-16 and O-18 confirm that the complex contains only one oxygen atom. Laplace DLTS combined with uniaxial stress has been used to obtain information on the symmetry of the VO complex. It was found that the defect in VO-- state has orthorhombic-I symmetry (point group C-2v) as for the case of the VO in Si. (C) 2003 Elsevier B.V. All rights reserved.},
  author       = {Markevich, VP and Litvinov, VV and Dobaczewski, L and Lindström, Lennart and Murin, LI and Vetrov, SV and Hawkins, ID and Peaker, AR},
  issn         = {0921-4526},
  keyword      = {local vibrational modes,energy levels,Ge,vacancy-oxygen,symmetry},
  language     = {eng},
  pages        = {844--848},
  publisher    = {Elsevier},
  series       = {Physica B: Condensed Matter},
  title        = {Vacancy-oxygen complex in Ge crystals},
  url          = {http://dx.doi.org/10.1016/j.physb.2003.09.227},
  volume       = {340},
  year         = {2003},
}