Interplay between Forward and Backward Scattering of Spin–Orbit Split Surface States of Bi(111)

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 positio...

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Bibliographic Details
Published in:Nano letters 2013-06, Vol.13 (6), p.2717-2722
Main Authors: Cottin, Maren C, Bobisch, Christian A, Schaffert, Johannes, Jnawali, Giriraj, Bihlmayer, Gustav, Möller, Rolf
Format: Article
Language:English
Subjects:
Channels
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Density
Dipping
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Electronic structure of nanoscale materials : clusters, nanoparticles, nanotubes, and nanocrystals
Exact sciences and technology
Fourier transforms
Mathematical analysis
Oscillations
Physics
Scattering
Vectors (mathematics)
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Summary: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 Δk. If the scattering phase of both processes differs by π 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.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl400878r