Coherent Precession of an Individual 5/2 Spin

• Published in: Physical review letters Vol. 113; no. 22; p. 227202
• Main Authors: Goryca, M, Koperski, M, Wojnar, P, Smoleński, T, Kazimierczuk, T, Golnik, A, Kossacki, P
• Format: Journal Article
• Language: English
• Published: United States 28-11-2014
• Subjects: Cadmium tellurides; Coherence; Electronics; Evolution; Magnetic fields; Occupation; Precession; Strain
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.113.227202

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.