纤锌矿InP纳米线的Eshelby扭曲增强及局域晶体转动的测量
Enhanced Eshelby Twist on Thin Wurtzite InP Nanowires and Measurement of Local Crystal Rotation
摘要：
我们已经进行了详细的研究含有轴向螺旋位错的InP纤锌矿纳米线的晶格畸变。Eshelby预测，这种系统应显示晶体旋转由于位错诱导扭矩。我们已经测量了个别线的扭曲率和位错伯格斯矢量，揭示了具有10纳米半径的纳米线具有高达100%的扭曲大于弹性理论估计。由变形引起的应变具有墨西哥帽状几何形状，这可以为载流子创建管状势阱。
英文摘要：
We have performed a detailed study of the lattice distortions of InP wurtzite nanowires containing an axial screw dislocation. Eshelby predicted that this kind of system should show a crystal rotation due to the dislocation induced torque. We have measured the twisting rate and the dislocation Burgers vector on individual wires, revealing that nanowires with a 10-nm radius have a twist up to 100% larger than estimated from elasticity theory. The strain induced by the deformation has a Mexican-hat-like geometry, which may create a tube-like potential well for carriers.
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