Dynamic nuclear polarization of 29Si nuclei induced by Li and Li-O centers in silicon

Mohammad R. Rahman, Tatsumasa Itahashi, Marina P. Vlasenko, Leonid S. Vlasenko, Eugene E. Haller, Kohei M Itoh

Research output: Contribution to journalArticle

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Abstract

Dynamic nuclear polarization (DNP) of 29Si nuclear spins induced by saturation of electron paramagnetic resonance (EPR) transitions of lithiumrelated centers in float zone (FZ) grown silicon is reported. Both isolated Li and Li-O complex centers showed strong EPR absorption lines in the temperature range 3.4-10 K and led to very efficient orientation of 29Si nuclear spins. The temperature dependence and time constant of 29Si DNP are investigated in detail. The 29Si DNP of 0.72% was achieved at 3.4 K by excitation of the Li-O forbidden EPR transition underillumination, corresponding to a ∼352 fold increase with respect to the thermal equilibrium polarization.

Original languageEnglish
Pages (from-to)1030011-1030015
Number of pages5
JournalJapanese Journal of Applied Physics
Volume49
Issue number10
DOIs
Publication statusPublished - 2010 Oct

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Polarization
Paramagnetic resonance
Silicon
electron paramagnetic resonance
nuclei
silicon
polarization
nuclear spin
float zones
time constant
saturation
Temperature
temperature dependence
excitation
temperature
Hot Temperature

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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Dynamic nuclear polarization of 29Si nuclei induced by Li and Li-O centers in silicon. / Rahman, Mohammad R.; Itahashi, Tatsumasa; Vlasenko, Marina P.; Vlasenko, Leonid S.; Haller, Eugene E.; Itoh, Kohei M.

In: Japanese Journal of Applied Physics, Vol. 49, No. 10, 10.2010, p. 1030011-1030015.

Research output: Contribution to journalArticle

Rahman, MR, Itahashi, T, Vlasenko, MP, Vlasenko, LS, Haller, EE & Itoh, KM 2010, 'Dynamic nuclear polarization of 29Si nuclei induced by Li and Li-O centers in silicon', Japanese Journal of Applied Physics, vol. 49, no. 10, pp. 1030011-1030015. https://doi.org/10.1143/JJAP.49.103001
Rahman, Mohammad R. ; Itahashi, Tatsumasa ; Vlasenko, Marina P. ; Vlasenko, Leonid S. ; Haller, Eugene E. ; Itoh, Kohei M. / Dynamic nuclear polarization of 29Si nuclei induced by Li and Li-O centers in silicon. In: Japanese Journal of Applied Physics. 2010 ; Vol. 49, No. 10. pp. 1030011-1030015.
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