| AVS 54th International Symposium | |
| Magnetic Interfaces and Nanostructures | Thursday Sessions |
| Session MI-ThM |
| Session: | Magnetic Semiconductors I |
| Presenter: | P.I. Archer, University of Washington |
| Authors: | P.I. Archer, University of Washington D.R. Gamelin, University of Washington |
| Correspondent: | Click to Email |
We report the first direct observation of sp-d dopant-carrier exchange interactions in colloidal doped wurtzite CdSe nanocrystals. Doped diluted magnetic semiconductor quantum dots (DMS-QDs) were prepared by thermal decomposition of an inorganic precursor cluster in the presence of TMCl2 (TM2+ = Mn2+ or Co2+) in hexadecylamine and were characterized by multiple spectroscopic and analytical techniques. Using magnetic circular dichroism spectroscopy, successful doping and the existence of giant excitonic Zeeman splittings in both Mn2+- and Co2+-doped wurtzite CdSe quantum dots are demonstrated unambiguously.