Related Experiment Video
Updated: Dec 31, 2025

Author Spotlight: Unveiling the Potential of VSFG Microscopy in Studying Mesoscopically Heterogeneous Self-Assembled Structures
Published on: December 1, 2023
Peculiar Rashba splitting originating from the two-dimensional symmetry of the surface
Kazuyuki Sakamoto1, Haruya Kakuta, Katsuaki Sugawara
1Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan. kazuyuki_sakamoto@faculty.chiba-u.jp
Abstract:
A peculiar Rashba effect is found at a point in the Brillouin zone, where the time-reversal symmetry is broken, though this symmetry was believed to be a necessary condition for Rashba splitting. This finding obtained experimentally by photoemission measurements on a Bi/Si(111)-(sqrt(3) x sqrt(3)) surface is fully confirmed by a first-principles theoretical calculation. We found that the peculiar Rashba effect is simply understood by the two-dimensional symmetry of the surface, and that this effect leads to an unconventional nonvortical Rashba spin structure at a point with time-reversal invariance.
Related Concept Videos
Gauss's Law: Planar Symmetry
Routh-Hurwitz Criterion II
The first scenario occurs when a singular zero appears in the first column of the Routh table. This situation creates a division by zero issues. To resolve this, a small positive or negative number, denoted as epsilon (∈), is substituted for the zero. The stability analysis proceeds by assuming a sign for ∈. If ∈ is positive, any sign change in the first...
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
¹H NMR: Complex Splitting
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
Gauss's Law: Spherical Symmetry
Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals

