PbO2薄膜量子阱态的Rashba型自旋轨道分裂
Rashba type spin-orbit splitting of quantum well states in ultrathin Pb films
摘要：
发现Si（111）上超薄Pb膜中形成的量子阱态存在Rashba型自旋轨道分裂。由此产生的动量分裂与半导体异质结构中发现的情况相当。与Au（111）表面态的Rashba分裂相比，分裂不显示覆盖依赖性，并且自旋极化的符号反转。我们解释我们的结果在两个边界的Pb层的竞争效应。
英文摘要：
A Rashba type spin-orbit splitting is found for quantum well states formed in ultrathin Pb films on Si(111). The resulting momentum splitting is comparable to what is found for semiconductor heterostructures. The splitting shows no coverage dependency and the sign of the spin polarization is reversed compared to Rashba splitting in the Au(111) surface state. We explain our results by competing effects at the two boundaries of the Pb layer.
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