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arXiv 1202.3295cond-mat.mtrl-sci
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锌掺杂稀磁半导体中体单轴各向异性的起源

Origin of bulk uniaxial anisotropy in zinc-blende dilute magnetic semiconductors

M. Birowska, C. Sliwa, J. A. Majewski, T. Dietl

摘要:

结果表明,GaAs(001)表面上最近邻的Mn对在[-110]方向上的能量比在[110]方向上的能量低。根据群论和Luttinger的不变量方法,这种特定的Mn分布导致体单轴面内和面外各向异性。用微扰法和从头算方法计算得到的各向异性能的符号和大小与实验结果一致。

英文摘要:

It is demonstrated that the nearest neighbor Mn pair on the GaAs (001) surface has a lower energy for the [-110] direction comparing to the [110] case. According to the group theory and the Luttinger's method of invariants, this specific Mn distribution results in bulk uniaxial in-plane and out-of-plane anisotropies. The sign and magnitude of the corresponding anisotropy energies determined by a perturbation method and ab initio computations are consistent with experimental results.

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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