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HgCdTe薄膜的反局域效应
Antilocalization effect in HgCdTe film
【摘要】 利用液相外延法制备了Hg0.77Cd0.23Te薄膜样品,在对样品的低温磁输运测试中观察到反局域效应,说明样品中存在较强的自旋-轨道耦合.通过Hikami-Larkin-Nagaoka(HLN)局域模型加上Drude电导模型拟合磁电导曲线,得到了电子的退相干时间和自旋-轨道散射时间.研究结果表明,电子的退相规律符合Nyquist退相机制.
【Abstract】 The antilocalization effect is observed by magnetotransport measurement at low temperature on a Hg0.77Cd0.23 Te sample prepared by liquid epitaxy technique,which suggests a strong spin-orbit interaction within this system.The phase coherence time and spin-orbit scattering time of electrons are extracted by fitting the experiment data with the Hikami-Larkin-Nagaoka(HLN) theory plus the Drude conductance model.According to the temperature dependence of phase coherence time,we also find that the Nyquist mechanism dominates the dephasing process.
【Key words】 antilocalization; phase coherence time; spin-orbit interaction;
- 【文献出处】 红外与毫米波学报 ,Journal of Infrared and Millimeter Waves , 编辑部邮箱 ,2013年02期
- 【分类号】O471.1
- 【被引频次】5
- 【下载频次】130