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Local vibrational modes of the oxygen-vacancy complex in germanium

Litvinov, VV; Murin, LI; Lindström, Lennart LU ; Markevich, VP and Petukh, AN (2002) In Semiconductors 36(6). p.621-624
Abstract
Infrared absorption of n- and p-Ge crystals enriched with O-16 and/or O-18 isotopes was studied after irradiation with 6-MeV electrons. Absorption spectra were measured at 10 and 300 K. Along with known bands characteristic of oxygen-containing defects, new lines at 669, 944, and 990 cm(-1) were detected. These bands are annealed at temperatures of 120-140degreesC; the band at 621 cm(-1), previously related to the vacancy-oxygen complex in Ge, is simultaneously annealed. The bands at 621 and 669 cm(-1) showed identical temperatures (10 --> 300 K) and oxygen isotope (O-16 --> O-18) shifts. These bands were found to correspond to various charge states of a defect with an energy level near E-v = 0.25 +/- 0.03 eV. It is assumed that such... (More)
Infrared absorption of n- and p-Ge crystals enriched with O-16 and/or O-18 isotopes was studied after irradiation with 6-MeV electrons. Absorption spectra were measured at 10 and 300 K. Along with known bands characteristic of oxygen-containing defects, new lines at 669, 944, and 990 cm(-1) were detected. These bands are annealed at temperatures of 120-140degreesC; the band at 621 cm(-1), previously related to the vacancy-oxygen complex in Ge, is simultaneously annealed. The bands at 621 and 669 cm(-1) showed identical temperatures (10 --> 300 K) and oxygen isotope (O-16 --> O-18) shifts. These bands were found to correspond to various charge states of a defect with an energy level near E-v = 0.25 +/- 0.03 eV. It is assumed that such a defect is the vacancy-oxygen complex (A center). The weak bands at 944 and 990 cm(-1) were identified as combinations of asymmetric stretching modes at 621 and 669 cm(-1) with a symmetric one at 320 cm(-1) for neutral and negative charge states of the A center, respectively. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Semiconductors
volume
36
issue
6
pages
621 - 624
publisher
American Institute of Physics
external identifiers
  • wos:000176025100003
  • scopus:0036624570
ISSN
1063-7826
DOI
10.1134/1.1485658
language
English
LU publication?
yes
id
628b27e0-ae0a-4bbe-a4c8-79da3ec124cc (old id 335665)
date added to LUP
2007-11-23 12:23:17
date last changed
2017-01-01 06:56:13
@article{628b27e0-ae0a-4bbe-a4c8-79da3ec124cc,
  abstract     = {Infrared absorption of n- and p-Ge crystals enriched with O-16 and/or O-18 isotopes was studied after irradiation with 6-MeV electrons. Absorption spectra were measured at 10 and 300 K. Along with known bands characteristic of oxygen-containing defects, new lines at 669, 944, and 990 cm(-1) were detected. These bands are annealed at temperatures of 120-140degreesC; the band at 621 cm(-1), previously related to the vacancy-oxygen complex in Ge, is simultaneously annealed. The bands at 621 and 669 cm(-1) showed identical temperatures (10 --> 300 K) and oxygen isotope (O-16 --> O-18) shifts. These bands were found to correspond to various charge states of a defect with an energy level near E-v = 0.25 +/- 0.03 eV. It is assumed that such a defect is the vacancy-oxygen complex (A center). The weak bands at 944 and 990 cm(-1) were identified as combinations of asymmetric stretching modes at 621 and 669 cm(-1) with a symmetric one at 320 cm(-1) for neutral and negative charge states of the A center, respectively.},
  author       = {Litvinov, VV and Murin, LI and Lindström, Lennart and Markevich, VP and Petukh, AN},
  issn         = {1063-7826},
  language     = {eng},
  number       = {6},
  pages        = {621--624},
  publisher    = {American Institute of Physics},
  series       = {Semiconductors},
  title        = {Local vibrational modes of the oxygen-vacancy complex in germanium},
  url          = {http://dx.doi.org/10.1134/1.1485658},
  volume       = {36},
  year         = {2002},
}