Dynamic Nuclear Polarization and Nuclear Magnetic Resonance in the Simplest Pseudospin Quantum Hall Ferromagnet

H. W. Liu; K. F. Yang; T. D. Mishima; M. B. Santos; Y. Hirayama

doi:10.1103/PhysRevB.82.241304

Dynamic Nuclear Polarization and Nuclear Magnetic Resonance in the Simplest Pseudospin Quantum Hall Ferromagnet

Mesoscale and Nanoscale Physics 2015-05-18 v3

Authors: H. W. Liu , K. F. Yang , T. D. Mishima , M. B. Santos , Y. Hirayama

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Abstract

We present dynamic nuclear polarization (DNP) in the simplest pseudospin quantum Hall ferromagnet (QHF) of an InSb two-dimensional electron gas with a large g factor using tilted magnetic fields. The DNP-induced amplitude change of a resistance spike of the QHF at large current enables observation of the resistively detected nuclear magnetic resonance of the high nuclear spin isotope 115In with nine quadrupole splittings. Our results demonstrate the importance of domain structures in the DNP process. The nuclear spin relaxation time T1 in this QHF was relatively short (~ 120 s), and almost temperature independent.

Keywords

dynamic nuclear polarization nuclear magnetic resonance quantum Hall ferromagnet pseudospin two-dimensional electron gas quadrupole splitting nuclear spin relaxation

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@article{arxiv.1002.3087,
  title  = {Dynamic Nuclear Polarization and Nuclear Magnetic Resonance in the Simplest Pseudospin Quantum Hall Ferromagnet},
  author = {H. W. Liu and K. F. Yang and T. D. Mishima and M. B. Santos and Y. Hirayama},
  journal= {arXiv preprint arXiv:1002.3087},
  year   = {2015}
}

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16 pages, 4 figures, PRB rapid communications, selected as an Editors' suggestion

Dynamic Nuclear Polarization and Nuclear Magnetic Resonance in the Simplest Pseudospin Quantum Hall Ferromagnet

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