Friday, November 30, 2012

1211.6854 (M. V. Durnev et al.)

Magnetic field induced valence band mixing in [111] grown semiconductor
quantum dots
   [PDF]

M. V. Durnev, M. M. Glazov, E. L. Ivchenko, M. Jo, T. Mano, T. Kuroda, K. Sakoda, S. Kunz, G. Sallen, L. Bouet, X. Marie, D. Lagarde, T. Amand, B. Urbaszek
We present a microscopic theory of the magnetic field induced mixing of heavy-hole states +/- 3/2 in GaAs droplet dots grown on (111)A substrates. The proposed theoretical model takes into account the striking dot shape with trigonal symmetry revealed in atomic force microscopy. Our calculations of the hole states are carried out within the Luttinger Hamiltonian formalism, supplemented with allowance for the triangularity of the confining potential. They are in quantitative agreement with the experimentally observed polarization selection rules, emission line intensities and energy splittings in both longitudinal and transverse magnetic fields for neutral and charged excitons in all measured single dots.
View original: http://arxiv.org/abs/1211.6854

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