Original Publication Date
Applied Physics Letters
DOI of Original Publication
Date of Submission
The ensemble averaged spin dephasing rate of localized electrons in the organic molecule tris(8-hydroxyquinoline aluminum) or Alq3 has been found to be significantly larger in bulk powder than in single- or few-molecule clusters confined within 1–2 nm sized nanocavities [B. Kanchibotla et al., Phys. Rev. B78, 193306 (2008)]. To understand this observation, we have compared the midinfrared absorption spectra of bulk powder and single- or few-molecule clusters. It appears that molecules have additional vibrational modes in bulk powder possibly due to multimerization. Their coupling with spin may be responsible for the increased spin dephasing rate in bulk powder.
Das, L., Mateo, J., Bandyopadhyay, S., et al. Motional modes in bulk powder and few-molecule clusters of tris(8-hydroxyquinoline aluminum) and their relation to spin dephasing. Applied Physics Letters, 98, 063109 (2011). Copyright © 2011 AIP Publishing LLC.
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VCU Electrical and Computer Engineering Publications