Microscopic characteristics of dynamic nuclear polarization and selective nuclear depolarization at the ν=2/3 spin phase transition

Microscopic characteristics of dynamic nuclear polarization and selective nuclear depolarization at the ν=2/3 spin phase transition
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ν=2/3自旋相变动态核极化和选择性核去极化的微观特征

DOI:
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发表时间:
2012
期刊:
影响因子:
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通讯作者:
Y. Hirayama
Y. Hirayama
中科院分区:
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文献类型:
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作者:
M. H. Fauzi;S. Watanabe;Y. Hirayama

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在半导体量子结构中操纵核自旋自由度的能力对于发展基于固态系统的核自旋电子学是必要的。在这里,我们开发了一种方法,通过对填充物ν=2/3的自旋跃迁处获得的自旋非极化或自旋极化核磁共振线施加射频脉冲,选择性地去极化动态核极化后GaAs量子阱样品中的核自旋,即π +Iz π或π −Iz π分量。我们的研究结果证明了自旋非极化(自旋极化)域介导了π +Iz π(π −Iz π)核自旋极化。
The ability to manipulate the nuclear spin degree of freedom in semiconductor quantum structures is necessary for development of nuclear spintronics based on solid-state systems. Here, we developed a method to selectively depolarize the nuclear spin, the 〈+Iz〉 or the 〈−Iz〉 component, residing in a GaAs quantum well specimen after dynamic nuclear polarization by applying radio frequency pulse to either spin-unpolarized or spin-polarized nuclear magnetic resonance lines obtained at the spin transition of the filling ν=2/3. Our results are evidence that the spin-unpolarized (spin-polarized) domain mediates the 〈+Iz〉 (〈−Iz〉) nuclear spin polarization.
DOI: 10.1103/physrevlett.92.086802
发表时间: 2004-02
影响因子: 8.6
作者:
J. Smet;R. Deutschmann;F. Ertl;W. Wegschei der;G. Abstreiter;K. von Klitzing
通讯作者: J. Smet;R. Deutschmann;F. Ertl;W. Wegschei der;G. Abstreiter;K. von Klitzing
DOI: 10.1038/415281a
发表时间: 2002-01-17
期刊: NATURE
影响因子: 64.8
作者:
Smet, JH;Deutschmann, RA;von Klitzing, K
通讯作者: von Klitzing, K