Theoretical calculations of the optical band positions and spin-Hamiltonian parameters for Cr3+ ions in Y2Ti2O7 crystal

2012 ◽  
Vol 407 (18) ◽  
pp. 3881-3883 ◽  
Author(s):  
Mei Yang ◽  
Yang Yu-Guang ◽  
Zheng Wen-Chen
Keyword(s):  
Theoretical Calculations ◽  
Spin Hamiltonian ◽  
Hamiltonian Parameters

scholarly journals Identification of the Negative Carbon Vacancy at Quasi-Cubic Site in 4H-SiC by EPR and Theoretical Calculations

2014 ◽  
Vol 778-780 ◽  
pp. 285-288
Author(s):  
Xuan Thang Trinh ◽  
Krisztián Szász ◽  
Tamas Hornos ◽  
Koutarou Kawahara ◽  
Jun Suda ◽  
...  
Keyword(s):  
Room Temperature ◽  
Defect Formation ◽  
Theoretical Calculations ◽  
Low Energy ◽  
Spin Hamiltonian ◽  
Epr Spectrum ◽  
Paramagnetic Resonance ◽  
Carbon Vacancy ◽  
Hamiltonian Parameters ◽  
Electron Paramagnetic

In freestandingn-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, VC- (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, VC- (k). The identification is further supported by hyperfine calculations.

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