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Strain and origin of inhomogeneous broadening probed by optically detected nuclear magnetic resonance in a (110) GaAs quantum well

机译:(110)GaAs量子阱中通过光学检测核磁共振探测的不均匀扩展的应变和起源

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摘要

We obtained strain and electric field gradient (EFG) in an n-GaAs/Al_(0.3)Ga_(0.7)As (110) quantum well (QW) by optically detected nuclear magnetic resonance (NMR). The dependence of the quadrupolar splitting on an angle between the QW plane and a static magnetic field provided the crystalline-orientation-dependent EFG and strain in the GaAs QW. We also explored the dependence of the NMR line widths on the direction of the external magnetic field with respect to the QW plane. It is likely that the nonuniform EFG as well as the hyperfine interaction governs the inhomogeneous broadening of NMR spectra.
机译:我们通过光学检测的核磁共振(NMR)在n-GaAs / Al_(0.3)Ga_(0.7)As(110)量子阱(QW)中获得了应变和电场梯度(EFG)。四极分裂对QW平面和静磁场之间夹角的依赖性提供了GaAs QW中依赖于晶体取向的EFG和应变。我们还探讨了NMR线宽对外部磁场相对于QW平面的方向的依赖性。 EFG的不均匀以及超精细相互作用很可能控制NMR光谱的不均匀扩展。

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  • 来源
    《Physical review》 |2014年第11期|115308.1-115308.4|共4页
  • 作者单位

    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Katahira 2-1-1 ,Aoba-ku, Sendai 980-8577, Japan;

    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Katahira 2-1-1 ,Aoba-ku, Sendai 980-8577, Japan;

    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Katahira 2-1-1 ,Aoba-ku, Sendai 980-8577, Japan;

    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Katahira 2-1-1 ,Aoba-ku, Sendai 980-8577, Japan;

    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Katahira 2-1-1 ,Aoba-ku, Sendai 980-8577, Japan ,Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba Japan;

    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Katahira 2-1-1 ,Aoba-ku, Sendai 980-8577, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields; nuclear magnetic resonance and relaxation; optically detected magnetic resonance (ODMR); Ⅱ-Ⅵ semiconductors;

    机译:磁电子学自旋电子学:利用自旋极化传输或集成磁场的设备;核磁共振和弛豫;光学检测磁共振(ODMR);Ⅱ-Ⅵ半导体;

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