Identification of the negative carbon vacancy at quasi-cubic site in 4H-SIC by EPR and theoretical calculations

X. T. Trinh, K. Szász, T. Hornos, K. Kawahara, J. Suda, T. Kimoto, A. Gali, E. Janzén, N. T. Son

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In freestanding n-type 4H-SiC epilayers irradiated with low-energy (250 keV) electrons at room temperature, the electron paramagnetic resonance (EPR) spectrum of the negative carbon vacancy at the hexagonal site, V- C(h), and a new signal were observed. From the similarity in defect formation and the spin-Hamiltonian parameters of the two defects, the new center is suggested to be the negative C vacancy at the quasi-cubic site, V- C (k). The identification is further supported by hyperfine calculations.

Original languageEnglish
Title of host publicationMaterials Science Forum
PublisherTrans Tech Publications Ltd
Pages285-288
Number of pages4
Volume778-780
ISBN (Print)9783038350101
DOIs
Publication statusPublished - 2014
Event15th International Conference on Silicon Carbide and Related Materials, ICSCRM 2013 - Miyazaki, Japan
Duration: Sep 29 2013Oct 4 2013

Publication series

NameMaterials Science Forum
Volume778-780
ISSN (Print)02555476

Other

Other15th International Conference on Silicon Carbide and Related Materials, ICSCRM 2013
CountryJapan
CityMiyazaki
Period9/29/1310/4/13

Fingerprint

structural influence coefficients
Vacancies
Paramagnetic resonance
electron paramagnetic resonance
Carbon
Hamiltonians
Defects
Epilayers
carbon
defects
Electrons
room temperature
electrons
Temperature
energy

Keywords

  • Carbon vacancy
  • Electron irradiation
  • EPR
  • Negative-U behavior
  • Supercell calculations

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Trinh, X. T., Szász, K., Hornos, T., Kawahara, K., Suda, J., Kimoto, T., ... Son, N. T. (2014). Identification of the negative carbon vacancy at quasi-cubic site in 4H-SIC by EPR and theoretical calculations. In Materials Science Forum (Vol. 778-780, pp. 285-288). (Materials Science Forum; Vol. 778-780). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.778-780.285

Identification of the negative carbon vacancy at quasi-cubic site in 4H-SIC by EPR and theoretical calculations. / Trinh, X. T.; Szász, K.; Hornos, T.; Kawahara, K.; Suda, J.; Kimoto, T.; Gali, A.; Janzén, E.; Son, N. T.

Materials Science Forum. Vol. 778-780 Trans Tech Publications Ltd, 2014. p. 285-288 (Materials Science Forum; Vol. 778-780).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Trinh, XT, Szász, K, Hornos, T, Kawahara, K, Suda, J, Kimoto, T, Gali, A, Janzén, E & Son, NT 2014, Identification of the negative carbon vacancy at quasi-cubic site in 4H-SIC by EPR and theoretical calculations. in Materials Science Forum. vol. 778-780, Materials Science Forum, vol. 778-780, Trans Tech Publications Ltd, pp. 285-288, 15th International Conference on Silicon Carbide and Related Materials, ICSCRM 2013, Miyazaki, Japan, 9/29/13. https://doi.org/10.4028/www.scientific.net/MSF.778-780.285
Trinh XT, Szász K, Hornos T, Kawahara K, Suda J, Kimoto T et al. Identification of the negative carbon vacancy at quasi-cubic site in 4H-SIC by EPR and theoretical calculations. In Materials Science Forum. Vol. 778-780. Trans Tech Publications Ltd. 2014. p. 285-288. (Materials Science Forum). https://doi.org/10.4028/www.scientific.net/MSF.778-780.285
Trinh, X. T. ; Szász, K. ; Hornos, T. ; Kawahara, K. ; Suda, J. ; Kimoto, T. ; Gali, A. ; Janzén, E. ; Son, N. T. / Identification of the negative carbon vacancy at quasi-cubic site in 4H-SIC by EPR and theoretical calculations. Materials Science Forum. Vol. 778-780 Trans Tech Publications Ltd, 2014. pp. 285-288 (Materials Science Forum).
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abstract = "In freestanding n-type 4H-SiC epilayers irradiated with low-energy (250 keV) electrons at room temperature, the electron paramagnetic resonance (EPR) spectrum of the negative carbon vacancy at the hexagonal site, V- C(h), and a new signal were observed. From the similarity in defect formation and the spin-Hamiltonian parameters of the two defects, the new center is suggested to be the negative C vacancy at the quasi-cubic site, V- C (k). The identification is further supported by hyperfine calculations.",
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