Phys. Rev. Lett. 97, 197202 (2006) [4 pages]Electrically Tunable g Factors in Quantum Dot Molecular Spin StatesReceived 4 August 2006; published 10 November 2006 We present a magnetophotoluminescence study of individual vertically stacked InAs/GaAs quantum dot pairs separated by thin tunnel barriers. As an applied electric field tunes the relative energies of the two dots, we observe a strong resonant increase or decrease in the g factors of different spin states that have molecular wave functions distributed over both quantum dots. We propose a phenomenological model for the change in g factor based on resonant changes in the amplitude of the wave function in the barrier due to the formation of bonding and antibonding orbitals. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.197202
DOI:
10.1103/PhysRevLett.97.197202
PACS:
75.40.Gb, 78.20.Ls, 78.47.+p, 78.67.Hc
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