Paper Title:
Evidence of the Ground Triplet State of Silicon-Carbon Divacancies (P6, P7 Centers) in 6H SiC: An EPR Study
  Abstract

P6 and P7 centers, which are responsible for semi-insulating properties of SiC, were shown to be neutral Si-C divacancies (VSi-VC)o having a triplet ground state. The EPR experiments that were performed at very low temperatures and in complete darkness exclude the possibility of a thermal or optically excited triplet state and, as a result, the existing model of excited triplet state P6 and P7 centers was discarded. The optical alignment process which induces the spin polarization of the ground triplet 3A state of the P6, P7 centers in SiC was interpreted to be caused by strong spin selectivity of the intersystem crossing (ISC) nonradiative transitions from an excited 3E state to a metastable singlet 1A state. The luminescence and optical absorption are caused by transitions between spin sublevels of 3A and 3E states. The analogy in properties of a divacancy in SiC and the N-V defect in diamond allows considering the divacancy in SiC as a potential defect for the single defect spectroscopy.

  Info
Periodical
Materials Science Forum (Volumes 527-529)
Edited by
Robert P. Devaty, David J. Larkin and Stephen E. Saddow
Pages
535-538
DOI
10.4028/www.scientific.net/MSF.527-529.535
Citation
I. V. Ilyin, M. V. Muzafarova, E.N. Mokhov, V. I. Sankin, P.G. Baranov, S.B. Orlinskii, J. Schmidt, "Evidence of the Ground Triplet State of Silicon-Carbon Divacancies (P6, P7 Centers) in 6H SiC: An EPR Study", Materials Science Forum, Vols. 527-529, pp. 535-538, 2006
Online since
October 2006
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