Self-Assembled Nanowires with Giant Rashba Split Bands
Self-Assembled Nanowires with Giant Rashba Split Bands
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DOI：
10.1103/physrevlett.110.036801
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发表时间：
2013-01-15
影响因子：
8.6
通讯作者：
Yeom, Han Woong
中科院分区：
文献类型：
--
作者：
Park, Jewook;Jung, Sung Won;Yeom, Han Woong
我们利用扫描隧道显微镜（STM）和角分辨光电子能谱研究了Pt在Si（110）表面诱导的纳米线。高分辨率的STM图像显示了1.6 nm宽和2.7 nm间距的有序纳米线阵列。角分辨光电发射揭示了完全占据的一维（1D）带与Rashba型分裂色散。局域dI/dV谱进一步表明纳米线上具有良好的一维电子通道，其态密度特性与Rashba型能带分裂一致。所观察到的能带的能量和动量分裂是有史以来报道的Rashba系统中最大的，这表明Pt-Si纳米线是一个独特的1D巨型Rashba系统。这种自组装的纳米线可以用于硅基自旋电子器件以及对马约拉纳费米子的探索。
We investigated Pt-induced nanowires on the Si(110) surface using scanning tunneling microscopy (STM) and angle-resolved photoemission. High resolution STM images show a well-ordered nanowire array of 1.6 nm width and 2.7 nm separation. Angle-resolved photoemission reveals fully occupied one-dimensional (1D) bands with a Rashba-type split dispersion. Local dI/dV spectra further indicate well-confined 1D electron channels on the nanowires, whose density of states characteristics are consistent with the Rashba-type band splitting. The observed energy and momentum splitting of the bands are among the largest ever reported for Rashba systems, suggesting the Pt-Si nanowire as a unique 1D giant Rashba system. This self-assembled nanowire can be exploited for silicon-based spintronics devices as well as the quest for Majorana fermions.