Theoretical Interpretation of Carbon‐13 Hyperfine Interactions in Electron Spin Resonance Spectra

1961 ◽  
Vol 35 (4) ◽  
pp. 1312-1323 ◽  
Author(s):  
Martin Karplus ◽  
George K. Fraenkel
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Hyperfine Interactions ◽  
Theoretical Interpretation ◽  
Spin Resonance

Electronic Structure ofFCenters: Hyperfine Interactions in Electron Spin Resonance

1953 ◽  
Vol 91 (5) ◽  
pp. 1066-1071 ◽  
Author(s):  
A. F. Kip ◽  
C. Kittel ◽  
R. A. Levy ◽  
A. M. Portis
Keyword(s):  
Electronic Structure ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Hyperfine Interactions ◽  
Spin Resonance

Positron Annihilation and Electron Spin Resonance of Electron-Irradiated 3C-SiC

1992 ◽  
Vol 262 ◽  
Author(s):  
Hisayoshi Itoh ◽  
Masahito Yoshikawa ◽  
Long Wei ◽  
Shoichiro Tanigawa ◽  
Isamu Nashiyama ◽  
...  
Keyword(s):  
Electron Spin Resonance ◽  
Positron Annihilation ◽  
Electron Spin ◽  
Removal Rate ◽  
Hyperfine Interactions ◽  
Effective Diffusion ◽  
Chemical Vapor ◽  
Spin Resonance ◽  
G Value ◽  
Cubic Silicon Carbide

ABSTRACTPositron annihilation and electron spin resonance (ESR) have been used to study defects introduced by lMeV electron irradiation in n-type cubic silicon carbide (3C-SiC) epitaxially grown on Si by chemical vapor deposition. Positron annihilation measurements by using variable-energy positron beams indicated the narrowing of the Doppler-broadened energy spectrum of annihilation gamma-rays and the decrease in the effective diffusion length of positrons with increasing the electron fluence. These results show the formation of vacancy-type defects in 3C-SiC. An ESR spectrum labeled T1, which has an isotropie g-value of 2.0029±0.0001, was observed in electron irradiated 3C-SiC. The T1 spectrum is interpreted by hyperfine interactions of paramagnetic electrons with 13C at four carbon sites and 29Si at twelve silicon sites, leads that the Tl center results from a point defect at a silicon sublattice site. The production rate of the Tl center was in good agreement with the carrier removal rate, indicating that the Tl center captures an electron from the conduction band. All these results are accounted for by the introduction of negatively charged vacancies at silicon sublattice sites in 3C-SiC by the irradiation.

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