Nanocomposites and nanomaterials

Spin-flip relaxation mechanism in Self-Assembled Quantum Dots via the emission of phonons.

V.N. Stavrou1,2 and Ioannis G. Tsoulos3

1 Division of Physics, Hellenic Naval Academy, Hatzikyriakou Avenue, Pireaus  
   185 39,  Greece E-mail: vstavrou@snd.edu.gr
2 Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242,    
   USA
3 Department of Computer Engineering, Technological Educational Institute of       
  Epirus, Greece

The spin-flip relaxation time for an electron in a self-assembled coupled quantum dots (SACQDs) due to emission of acoustic phonons, is presented. Arbitrary shaped quantum dots made with InAs embedded in a wetting layer InAs and surrounded by GaAs, are studied. The electronic states are calculated using 8-band strain dependent  theory. The dependence of spin-flip time on the shape the QDs, on the size, on temperature and on Zeeman energy is presented.

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