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Coherent Precession of an Individual 5/2 Spin
M Goryca1, M Koperski1, P Wojnar2
1Institute of Experimental Physics, University of Warsaw, ul. Hoża 69, 00-681 Warszawa, Poland.
Abstract:
We present direct observation of a coherent spin precession of an individual Mn^{2+} ion, having both electronic and nuclear spins equal to 5/2, embedded in a CdTe quantum dot and placed in a magnetic field. The spin state evolution is probed in a time-resolved pump-probe measurement of absorption of the single dot. The experiment reveals subtle details of the large-spin coherent dynamics, such as nonsinusoidal evolution of states occupation, and beatings caused by the strain-induced differences in energy levels separation. Sensitivity of the large-spin impurity on the crystal strain opens the possibility of using it as a local strain probe.
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