Observation of hysteretic transport due to dynamic nuclear spin polarization in a GaAs lateral double quantum dot

Takashi Kobayashi, Kenichi Hitachi, Satoshi Sasaki, Koji Muraki

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We report a new transport feature in a GaAs lateral double quantum dot that emerges for magnetic-field sweeps and shows hysteresis due to dynamic nuclear spin polarization (DNP). This DNP signal appears in the Coulomb blockade regime by virtue of the finite interdot tunnel coupling and originates from the crossing between ground levels of the spin triplet and singlet extensively used for nuclear spin manipulations in pulsed-gate experiments. The magnetic-field dependence of the current level is suggestive of unbalanced DNP between the two dots, which opens up the possibility of controlling electron and nuclear spin states via dc transport.

Original languageEnglish
Article number216802
JournalPhysical Review Letters
Volume107
Issue number21
DOIs
Publication statusPublished - 2011 Nov 14

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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