Spin exchange dynamics in 4H SiC monocrystals with different nitrogen donor concentrations

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00577456" target="_blank" >RIV/68378271:_____/23:00577456 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1063/5.0172320" target="_blank" >https://doi.org/10.1063/5.0172320</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/5.0172320" target="_blank" >10.1063/5.0172320</a>

Result language
angličtina
Original language name
Spin exchange dynamics in 4H SiC monocrystals with different nitrogen donor concentrations
Original language description
In this manuscript, we provide a comprehensive study of the spin coupling dynamics between conduction electrons and N donors in monocrystalline 4H SiC with concentrations of N donors from 10^17 to 5×10^19 cm^−3 by EPR and MW perturbation techniques at T=4.2–300 K. At low T, two triplets due to N donors in cubic (Nk) hexagonal (Nh) positions and triplet arisen from spin-interaction between Nh and Nk were observed in 4H SiC with Nd−Na≈10^17 cm^−3. A single S-line dominates the EPR spectra in all investigated samples at high T. It was established that this line occurs due to the exchange coupling of localized electrons (dominate at low T) and non-localized electrons (dominate at high T). Using the theoretical fitting of the temperature variation of S-line EPR linewidth in 4H SiC with Nd–Na≤5×10^18 cm^−3, the energy levels of 57–65 meV that correlate with the valley-orbit splitting values for Nk in 4H SiC monocrystals were obtained.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
<a href="/en/project/EF16_019%2F0000760" target="_blank" >EF16_019/0000760: Solid State Physics for 21st century</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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