Interplay between Forward and Backward Scattering of Spin鈥揙rbit Split Surface States of Bi(111)
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- 作者：Maren C. Cottin ; Christian A. Bobisch ; Johannes Schaffert ; Giriraj Jnawali ; Gustav Bihlmayer ; Rolf M枚ller
- 刊名：Nano Letters
- 出版年：2013
- 出版时间：June 12, 2013
- 年：2013
- 卷：13
- 期：6
- 页码：2717-2722
- 全文大小：360K
- 年卷期：v.13,no.6(June 12, 2013)
- ISSN：1530-6992
文摘
The electronic structure at the surface of Bi(111) enables us to study the effect of defects scattering into multiple channels. By performing scanning tunneling spectroscopy near step edges, we analyze the resulting oscillations in the local density of electronic states (LDOS) as function of position. At a given energy, forward and backward scattering not only occur simultaneously but may contribute to the same scattering vector 螖k. If the scattering phase of both processes differs by 蟺 and the amplitudes are almost equal, the oscillations cancel out. A sharp dip in the magnitude of the Fourier transform of the LDOS marks the crossover between forward and backward scattering channels.