Corfdir, P.Fontana, Y.Van Hattem, B.Russo-Averchi, E.Heiss, M.Fontcuberta I Morral, A.Phillips, R. T.2015-02-202015-02-202015-02-20201410.1063/1.4903515https://infoscience.epfl.ch/handle/20.500.14299/111494WOS:000346265200078We study the neutral exciton (X) and charged exciton (CX) transitions from (Al,Ga) As shell quantum dots located in core-shell nanowires, in the presence of a magnetic field. The g-factors and the diamagnetic coefficients of both the X and the CX depend on the orientation of the field with respect to the nanowire axis. The aspect ratio of the X wavefunction is quantified based on the anisotropy of the diamagnetic coefficient. For specific orientations of the magnetic field, it is possible to cancel the g-factor of the bright states of the X and the CX by means of an inversion of the sign of the hole's g-factor, which is promising for quantum information processing applications. (C) 2014 AIP Publishing LLC.text::journal::journal article::research article