Role of spin-orbit splitting and dynamical fluctuations in the Si(557)-Au surface -: art. no. 146803
Role of spin-orbit splitting and dynamical fluctuations in the Si(557)-Au surface -: art. no. 146803
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DOI：
10.1103/physrevlett.93.146803
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发表时间：
2004-10-01
影响因子：
8.6
通讯作者：
Martin, RM
中科院分区：
文献类型：
--
作者：
Sánchez-Portal, D;Riikonen, S;Martin, RM
我们的从头计算表明，自旋-轨道耦合对于理解Si(557)-Au表面的电子结构是至关重要的。自旋-轨道分裂产生了在光电子能谱中观察到的两个一维能带，以前认为这是由于Luttinger液体中的自旋-电荷分离造成的。这种自旋分裂可能对未来的设备应用具有相关性。在扫描隧道显微镜下观察到的类Peierls相变是台阶边结构的动态涨落的结果，这种涨落随着温度的降低而熄灭。
Our ab initio calculations show that spin-orbit coupling is crucial to understand the electronic structure of the Si(557)-Au surface. The spin-orbit splitting produces the two one-dimensional bands observed in photoemission, which were previously attributed to spin-charge separation in a Luttinger liquid. This spin splitting might have relevance for future device applications. We also show that the apparent Peierls-like transition observed in this surface by scanning tunneling microscopy is a result of the dynamical fluctuations of the step-edge structure which are quenched as the temperature is decreased.