Detail publikačního výsledku

Terahertz electron paramagnetic resonance generalized spectroscopic ellipsometry: The magnetic response of the nitrogen defect in 4H-SiC

SCHUBERT, M.; KNIGHT, S.; RICHTER, S.; KUEHNE, P.; STANISHEV, V.; RUDER, A.; STOKEY, M.; KORLACKI, R.; IRMSCHER, K.; NEUGEBAUER, P.; DARAKCHIEVA, V.

Originální název

Terahertz electron paramagnetic resonance generalized spectroscopic ellipsometry: The magnetic response of the nitrogen defect in 4H-SiC

Anglický název

Terahertz electron paramagnetic resonance generalized spectroscopic ellipsometry: The magnetic response of the nitrogen defect in 4H-SiC

Druh

Článek WoS

Originální abstrakt

We report on terahertz (THz) electron paramagnetic resonance generalized spectroscopic ellipsometry (THz-EPR-GSE). Measurements of field and frequency dependencies of magnetic response due to spin transitions associated with nitrogen defects in 4H-SiC are shown as an example. THz-EPR-GSE dispenses with the need of a cavity, permits independently scanning field and frequency parameters, and does not require field or frequency modulation. We investigate spin transitions of hexagonal (h) and cubic (k) coordinated nitrogen including coupling with its nuclear spin (I = 1), and we propose a model approach for the magnetic susceptibility to account for the spin transitions. From the THz-EPR-GSE measurements, we can fully determine polarization properties of the spin transitions, and we can obtain the k coordinated nitrogen g and hyperfine splitting parameters using magnetic field and frequency dependent Lorentzian oscillator line shape functions. Magnetic-field line broadening presently obscures access to h parameters. We show that measurements of THz-EPR-GSE at positive and negative fields differ fundamentally and hence provide additional information. We propose frequency-scanning THz-EPR-GSE as a versatile method to study properties of spins in solid state materials.

Anglický abstrakt

We report on terahertz (THz) electron paramagnetic resonance generalized spectroscopic ellipsometry (THz-EPR-GSE). Measurements of field and frequency dependencies of magnetic response due to spin transitions associated with nitrogen defects in 4H-SiC are shown as an example. THz-EPR-GSE dispenses with the need of a cavity, permits independently scanning field and frequency parameters, and does not require field or frequency modulation. We investigate spin transitions of hexagonal (h) and cubic (k) coordinated nitrogen including coupling with its nuclear spin (I = 1), and we propose a model approach for the magnetic susceptibility to account for the spin transitions. From the THz-EPR-GSE measurements, we can fully determine polarization properties of the spin transitions, and we can obtain the k coordinated nitrogen g and hyperfine splitting parameters using magnetic field and frequency dependent Lorentzian oscillator line shape functions. Magnetic-field line broadening presently obscures access to h parameters. We show that measurements of THz-EPR-GSE at positive and negative fields differ fundamentally and hence provide additional information. We propose frequency-scanning THz-EPR-GSE as a versatile method to study properties of spins in solid state materials.

Klíčová slova

MAGNETOOPTIC ELLIPSOMETRY; FREQUENCY; EPR; PARAMETERS; ANISOTROPY; SPECTRA; ENDOR

Klíčová slova v angličtině

MAGNETOOPTIC ELLIPSOMETRY; FREQUENCY; EPR; PARAMETERS; ANISOTROPY; SPECTRA; ENDOR

Autoři

SCHUBERT, M.; KNIGHT, S.; RICHTER, S.; KUEHNE, P.; STANISHEV, V.; RUDER, A.; STOKEY, M.; KORLACKI, R.; IRMSCHER, K.; NEUGEBAUER, P.; DARAKCHIEVA, V.

Rok RIV

2023

Vydáno

08.03.2022

Nakladatel

AIP Publishing

Místo

MELVILLE

ISSN

0003-6951

Periodikum

Applied Physics Letters

Svazek

120

Číslo

10

Stát

Spojené státy americké

Strany od

1

Strany do

6

Strany počet

6

URL

https://aip.scitation.org/doi/10.1063/5.0082353

Plný text v Digitální knihovně

http://hdl.handle.net/11012/209154

BibTex

@article{BUT178581,
  author="Mathias {Schubert} and Sean {Knight} and Steffen {Richter} and Philipp {Kuehne} and Vallery {Stanishev} and Alexander {Ruder} and Megan {Stokey} and Rafal {Korlacki} and Klaus {Irmscher} and Petr {Neugebauer} and Vanya {Darakchieva}",
  title="Terahertz electron paramagnetic resonance generalized spectroscopic ellipsometry: The magnetic response of the nitrogen defect in 4H-SiC",
  journal="Applied Physics Letters",
  year="2022",
  volume="120",
  number="10",
  pages="1--6",
  doi="10.1063/5.0082353",
  issn="0003-6951",
  url="https://aip.scitation.org/doi/10.1063/5.0082353"
}