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Here, enabled by strong spin-orbit interaction, and under microwave (MW) illumination, we report hyperfine interaction and dynamic polarization of the nuclei <jats:italic>with confined heavy-holes<\/jats:italic> in a GaAs\/AlGaAs double quantum dot device. Distinct signatures of the resultant hyperfine field on the electron dipole spin resonance (EDSR) signal include: hysteresis on sweeping the magnetic (B-) field up and down with characteristics that are strongly dependent on both MW power and B-field sweep rate; free bidirectional dragging of the EDSR condition; stable locking on resonance on a timescale of hours; slow temporal change as the hyperfine field decays (T<jats:sub>1<\/jats:sub> nuclear decay time\u2009~\u2009100\u2009s); and oscillations in time commensurate with Larmor precession of the <jats:sup>75<\/jats:sup>As nuclei. We attain pumped nuclear (Overhauser) fields\u2009~\u200925 mT (~20% nuclear polarization).<\/jats:p>","DOI":"10.1038\/s41534-025-01075-0","type":"journal-article","created":{"date-parts":[[2025,8,7]],"date-time":"2025-08-07T09:14:55Z","timestamp":1754558095000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Bidirectional nuclear polarization through electric dipole spin resonance enabled by spin-orbit interaction in a single hole planar quantum dot device"],"prefix":"10.1038","volume":"11","author":[{"given":"Sergei","family":"Studenikin","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jordan","family":"Ducatel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Olivia","family":"Ellis","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marek","family":"Korkusinski","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alex","family":"Bogan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Piotr","family":"Zawadzki","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"D. 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