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Spin dynamics and hyperfine interaction in InAs semiconductor quantum dots
Author(s) -
Eble B.,
Braun P.F.,
Krebs O.,
Lombez L.,
Marie X.,
Urbaszek B.,
Amand T.,
Lagarde D.,
Renucci P.,
Voisin P.,
Lemaître A.,
Kowalik K.,
Kudelski A.,
Kalevich V.K.,
Kavokin K. V.
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200668001
Subject(s) - hyperfine structure , quantum dot , spins , condensed matter physics , exciton , spin (aerodynamics) , physics , relaxation (psychology) , electron , excitation , magnetic field , photoluminescence , semiconductor , atomic physics , quantum mechanics , optoelectronics , psychology , social psychology , thermodynamics
We present a detailed study of the hyperfine interaction between carrier and nuclear spins in InAs semiconductor quantum dots. Time resolved measurements on excitons in positively charged quantum dots show the electron spin relaxation due to random fluctuations of the spin orientation of the nuclei in the quantum dot. A complimentary aspect of the hyperfine interaction can be uncovered in single dot continuous wave photoluminescence experiments in a weak magnetic field, namely the Overhauser shift due to the dynamic polarisation of the nuclei following excitation with circularly polarised light. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)