Physics – Condensed Matter – Materials Science
Scientific paper
2011-08-08
Phys. Rev. B 84, 155453 (2011)
Physics
Condensed Matter
Materials Science
8 pages, 4 figures, 1 table
Scientific paper
10.1103/PhysRevB.84.155453
Spin polarized two-dimensional electronic states have been previously observed on metallic surface alloys with giant Rashba splitting and on the surface of topological insulators. We study the surface band structure of these systems, in a unified manner, by exploiting recent results of k.p theory. The model suggests a different way to address the effect of anisotropy in Rashba systems. Changes in the surface band structure of various Rashba compounds can be captured by a single effective parameter which quantifies the competition between the Rashba effect and the hexagonal warping of the constant energy contours. The same model provides a unified phenomenological description of the surface states belonging to materials with topologically trivial and non-trivial band structures.
Frantzeskakis Emmanouil
Grioni Marco
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