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arXiv 1306.6787cond-mat.mes-hallcond-mat.str-el
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锌半导体中受主束缚空穴对核自旋的动力学极化

Dynamical polarization of nuclear spins by acceptor-bound holes in a zinc blende semiconductor

K. V. Kavokin, A. V. Koudinov

摘要:

在锌掺杂半导体中,受主束缚空穴的基态是由空穴的自旋和轨道矩的矢量和的总角动量的四个本征态构成的。结果,空穴与晶格核的超精细相互作用变得各向异性和坐标相关。本文发展了一个由受主束缚空穴引起的核自旋的动态极化理论,充分考虑了其复杂的自旋结构。空穴-核翻转跃迁的速率取决于空穴的总角动量与原子核相对于受主中心的位置矢量之间的夹角。由此产生的空间不均匀的自旋极化的核引起的非等距自旋分裂的孔,这可以通过光学或微波光谱学的方法检测。

英文摘要:

The ground state of an acceptor-bound hole in a zinc-blende semiconductor is formed by four eigenstates of the total angular momentum, which is a vector sum of spin and orbital moment of the hole. As a result, the hyperfine interaction of the hole with lattice nuclei becomes anisotropic and coordinate-dependent. We develop a theory of dynamic polarization of nuclear spins by the acceptor-bound hole, giving full account for its complex spin structure. The rate of hole-nuclear flip-flop transitions is shown to depend on the angle between the total angular momentum of the hole and the position vector of the nucleus with respect to the acceptor center. The resulted spatially inhomogeneous spin polarization of nuclei gives rise to non-equidistant spin splitting of the hole, which can be detected by methods of optical or microwave spectroscopy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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