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

Xuan Thang Trinh; Krisztian Szasz; Tamas Hornos; Koutarou Kawahara; Jun Suda; Tsunenobu Kimoto; Adam Gali; Erik Janzén; Nguyen Tien Son

doi:10.4028/www.scientific.net/MSF.778-780.285

Paper Titles

Minority Carrier Transient Spectroscopy of As-Grown, Electron Irradiated and Thermally Oxidized p-Type 4H-SiC
p.269

Annealing of Electron Irradiated, Thick, Ultrapure 4H SiC between 1100°C and 1500°C and Measurements of Lifetime and Photoluminescence
p.273

Identification of Structures of the Deep Levels in 4H-SiC
p.277

Oxidation Induced ON₁, ON_2a/b Defects in 4H-SiC Characterized by DLTS
p.281

Identification of the Negative Carbon Vacancy at Quasi-Cubic Site in 4H-SiC by EPR and Theoretical Calculations
p.285

Defect Levels in High Purity Semi-Insulating 4H-SiC Studied by Alpha Particle Induced Charge Transient Spectroscopy
p.289

Correlation between Microwave Reflectivity and Excess Carrier Concentrations in 4H-SiC
p.293

Diffusion of Alkali Metals in SiC
p.297

Comparison of Carrier Lifetime Measurements and Mapping in 4H SiC Using Time Resolved Photoluminscence and μ-PCD
p.301

HomeMaterials Science ForumMaterials Science Forum Vols. 778-780Identification of the Negative Carbon Vacancy at...

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

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, 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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Materials Science Forum (Volumes 778-780)

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285-288

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.778-780.285

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Online since:

February 2014

Authors:

Xuan Thang Trinh*, Krisztian Szasz, Tamas Hornos, Koutarou Kawahara, Jun Suda, Tsunenobu Kimoto, Adam Gali, Erik Janzén, Nguyen Tien Son

Keywords:

Carbon Vacancy, Electron Irradiation, EPR, Negative-U Behavior, Supercell Calculations

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