2003/06/03 by M. Poggio, G. M. Steeves, R. C. Myers +3
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.91.207602
published as Phys. Rev. Lett. 91, 207602 (2003) · 18 pages, 4 figures
arxiv created 2003/06/03 · arxiv updated 2009/11/30
The shaping of nuclear spin polarization profiles and the induction of nuclear resonances are demonstrated within a parabolic quantum well using an externally applied gate voltage. Voltage control of the electron and hole wave functions results in nanometer-scale sheets of polarized nuclei positioned along the growth direction of the well. RF voltages across the gates induce resonant spin transitions of selected isotopes. This depolarizing effect depends strongly on the separation of electrons and holes, suggesting that a highly localized mechanism accounts for the observed behavior.