Spin dynamics in electrochemically charged CdSe quantum dots

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dc.creatorStern, N. P.
dc.creatorPoggio, M.
dc.creatorBartl, M. H.
dc.creatorHu, E. L.
dc.creatorStucky, G. D.
dc.creatorAwschalom, D. D.
dc.date2005-07-29
dc.date.accessioned2026-07-07T06:25:20Z
dc.date.available2026-07-07T06:25:20Z
dc.descriptionWe use time-resolved Faraday rotation to measure coherent spin dynamics in colloidal CdSe quantum dots charged in an electrochemical cell at room temperature. Filling of the 1Se electron level is demonstrated by the bleaching of the 1Se-1S3/2 absorption peak. One of the two Lande g-factors observed in uncharged quantum dots disappears upon filling of the 1Se electron state. The transverse spin coherence time, which is over 1 ns and is limited by inhomogeneous dephasing, also appears to increase with charging voltage. The amplitude of the spin precession signal peaks near the half-filling potential. Its evolution at charging potentials without any observable bleaching of the 1Se-1S3/2 transition suggests that the spin dynamics are influenced by low-energy surface states.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0507699
dc.identifierhttp://arxiv.org/abs/cond-mat/0507699
dc.identifierPhys. Rev. B 72, 161303(R) (2005)
dc.identifierdoi:10.1103/PhysRevB.72.161303
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/96805
dc.subjectOther Condensed Matter
dc.titleSpin dynamics in electrochemically charged CdSe quantum dots
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