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• W2049277211 abstract "Nuclear spin hyperpolarization is essential to future solid-state quantum computation using nuclear spin qubits and in highly sensitive magnetic resonance imaging. Though efficient dynamic nuclear polarization in semiconductors has been demonstrated at low temperatures for decades, its realization at room temperature is largely lacking. Here we demonstrate that a combined effect of efficient spin-dependent recombination and hyperfine coupling can facilitate strong dynamic nuclear polarization of a defect atom in a semiconductor at room temperature. We provide direct evidence that a sizeable nuclear field (~150 Gauss) and nuclear spin polarization (~15%) sensed by conduction electrons in GaNAs originates from dynamic nuclear polarization of a Ga interstitial defect. We further show that the dynamic nuclear polarization process is remarkably fast and is completed in <5 μs at room temperature. The proposed new concept could pave a way to overcome a major obstacle in achieving strong dynamic nuclear polarization at room temperature, desirable for practical device applications. In order to use nuclear spins for the creation of qubits, an efficient nuclear spin hyperpolarisation at room temperature is crucial. Here the authors show how this can be achieved by spin polarized conduction-band electrons in a semiconductor, exploiting the defect-engineered spin-filtering effect." @default.
• W2049277211 created "2016-06-24" @default.
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• W2049277211 date "2013-04-23" @default.
• W2049277211 modified "2023-09-27" @default.
• W2049277211 title "Efficient room-temperature nuclear spin hyperpolarization of a defect atom in a semiconductor" @default.
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• W2049277211 doi "https://doi.org/10.1038/ncomms2776" @default.
• W2049277211 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23612292" @default.
• W2049277211 hasPublicationYear "2013" @default.
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