Research output: Contribution to journal › Article › peer-review
Magnetic Resonance Study of p-Type 3C SiC Microparticles. / Savchenko, Dariya; Yukhymchuk, Volodymyr; Skoryk, Mykola; Ubyivovk, Evgeniy; Mokhov, Evgenii; Lančok, Jan; Shanina, Bela; Kalabukhova, Ekaterina.
In: Physica Status Solidi (B) Basic Research, Vol. 257, No. 12, 2000306, 12.2020.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Magnetic Resonance Study of p-Type 3C SiC Microparticles
AU - Savchenko, Dariya
AU - Yukhymchuk, Volodymyr
AU - Skoryk, Mykola
AU - Ubyivovk, Evgeniy
AU - Mokhov, Evgenii
AU - Lančok, Jan
AU - Shanina, Bela
AU - Kalabukhova, Ekaterina
PY - 2020/12
Y1 - 2020/12
N2 - The silicon carbide (SiC) 3C polytype microparticles with p-type conductivity are investigated by X-band electron paramagnetic resonance (EPR) technique in a wide temperature interval. Morphological and Raman studies show that the mean particle diameter is ≈8 μm, and the SiC polytype is purely 3C. At T = 10 K, the EPR spectrum of the shallow boron acceptor substituting cubic site (BK), with C3V symmetry and anisotropic g- and A-tensors resulting from static Jahn–Teller effect, is observed. At T > 30 K, a continuous transition from static to dynamic Jahn–Teller effect for BK is detected. The temperature-dependent BK principal g-values are explained by the transitions between the ground and excited vibronic states of BK. At T = 130–150 K, the BK center is characterized by Td symmetry and isotropic g- and A-tensors. At T = 60–190 K, an additional single EPR Lorentzian line with short spin relaxation times and isotropic g-value close to BK average g-value is observed. It was explained by averaging the anisotropic spectrum caused by rapid transitions between the boron ground and excited vibronic states split by Jahn–Teller potential. In addition, the EPR signal from carbon vacancy with characteristic superhyperfine structure is observed at T = 10–298 K.
AB - The silicon carbide (SiC) 3C polytype microparticles with p-type conductivity are investigated by X-band electron paramagnetic resonance (EPR) technique in a wide temperature interval. Morphological and Raman studies show that the mean particle diameter is ≈8 μm, and the SiC polytype is purely 3C. At T = 10 K, the EPR spectrum of the shallow boron acceptor substituting cubic site (BK), with C3V symmetry and anisotropic g- and A-tensors resulting from static Jahn–Teller effect, is observed. At T > 30 K, a continuous transition from static to dynamic Jahn–Teller effect for BK is detected. The temperature-dependent BK principal g-values are explained by the transitions between the ground and excited vibronic states of BK. At T = 130–150 K, the BK center is characterized by Td symmetry and isotropic g- and A-tensors. At T = 60–190 K, an additional single EPR Lorentzian line with short spin relaxation times and isotropic g-value close to BK average g-value is observed. It was explained by averaging the anisotropic spectrum caused by rapid transitions between the boron ground and excited vibronic states split by Jahn–Teller potential. In addition, the EPR signal from carbon vacancy with characteristic superhyperfine structure is observed at T = 10–298 K.
KW - acceptors
KW - boron
KW - electron paramagnetic resonance
KW - Jahn–Teller effect
KW - silicon carbide microparticles
KW - DEEP LEVELS
KW - EPR
KW - INTRINSIC DEFECTS
KW - ENDOR INVESTIGATIONS
KW - SILICON-CARBIDE
KW - IMPURITIES
KW - Jahn-Teller effect
KW - NANOPARTICLES
KW - SHALLOW BORON ACCEPTOR
KW - CAPACITANCE SPECTROSCOPY
KW - ELECTRONIC-STRUCTURE
UR - http://www.scopus.com/inward/record.url?scp=85089495186&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/1b5d1804-8a74-3de1-ba78-3bf8381d0dbc/
U2 - 10.1002/pssb.202000306
DO - 10.1002/pssb.202000306
M3 - Article
AN - SCOPUS:85089495186
VL - 257
JO - Physica Status Solidi (B): Basic Research
JF - Physica Status Solidi (B): Basic Research
SN - 0370-1972
IS - 12
M1 - 2000306
ER -
ID: 61459047