Magnetic resonance study of p-Type 3C SiC microparticles

0539391 - FZÚ 2021 RIV DE eng J - Článek v odborném periodiku
Savchenko, Dariia - Yukhymchuk, V. - Skoryk, M. - Ubyivovk, E. - Mokhov, E. - Lančok, Ján - Shanina, B. - Kalabukhova, E.
Magnetic resonance study of p-Type 3C SiC microparticles.
Physica Status Solidi B. Roč. 257, č. 12 (2020), s. 1-8, č. článku 2000306. ISSN 0370-1972. E-ISSN 1521-3951
Grant CEP: GA MŠMT EF16_013/0001406
Grant ostatní: OP VVV - SAFMAT(XE) CZ.02.1.01/0.0/0.0/16_013/0001406
Institucionální podpora: RVO:68378271
Klíčová slova: acceptors * boron * electron paramagnetic resonance * Jahn–Teller effect * silicon carbide microparticles
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.710, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1002/pssb.202000306

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 ¼ 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 gvalues are explained by the transitions between the ground and excited vibronic states of BK. At T ¼ 130–150 K, the BK center is characterized by Td symmetry and isotropic g- and A-tensors. At T ¼ 60–190 K, an additional single EPR Lorentzian line with short spin relaxation times and isotropic g-value close to BK average gvalue is observed.
Trvalý link: http://hdl.handle.net/11104/0317096