Print Email Facebook Twitter Suppression of Zeeman Gradients by Nuclear Polarization in Double Quantum Dots Title Suppression of Zeeman Gradients by Nuclear Polarization in Double Quantum Dots Author Frolov, S.M. Danon, J. Nadj-Perge, S. Zuo, K. Van Tilburg, J.W.W. Pribiag, V.S. Van den Berg, J.W.G. Bakkers, E.P.A.M. Kouwenhoven, L.P. Faculty Applied Sciences Department QN/Quantum Nanoscience Date 2012-12-05 Abstract We use electric dipole spin resonance to measure dynamic nuclear polarization in InAs nanowire quantum dots. The resonance shifts in frequency when the system transitions between metastable high and low current states, indicating the presence of nuclear polarization. We propose that the low and the high current states correspond to different total Zeeman energy gradients between the two quantum dots. In the low current state, dynamic nuclear polarization efficiently compensates the Zeeman gradient due to the g-factor mismatch, resulting in a suppressed total Zeeman gradient. We present a theoretical model of electron-nuclear feedback that demonstrates a fixed point in nuclear polarization for nearly equal Zeeman splittings in the two dots and predicts a narrowed hyperfine gradient distribution. To reference this document use: http://resolver.tudelft.nl/uuid:3eb839f2-f737-4e06-8acf-465185a6aba4 DOI https://doi.org/10.1103/PhysRevLett.109.236805 Publisher American Physical Society ISSN 0031-9007 Source http://link.aps.org/doi/10.1103/PhysRevLett.109.236805 Source Physical Review Letters, 109 (23), 2012 Part of collection Institutional Repository Document type journal article Rights © 2012 American Physical Society Files PDF Frolov_2012.pdf 799.93 KB Close viewer /islandora/object/uuid:3eb839f2-f737-4e06-8acf-465185a6aba4/datastream/OBJ/view