Different spin textures in one-dimensional electronic bands on Si(553)-Au surface

• Published in: Applied surface science Vol. 373; pp. 26 - 31
• Main Authors: Krawiec, M., Kopciuszyński, M., Zdyb, R.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.06.2016
• Subjects: ARPES; Density functional theory; DFT; Electronics; High index surfaces; Mathematical analysis; Orientation; Origins; Rashba effect; SARPES; Silicon; Spin–orbit interaction; Splitting; Surface layer; Texture; Rashba effect; DFT; SARPES; ARPES; High index surfaces; Silicon; Spin–orbit interaction
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2015.09.219

[Display omitted] •Rashba spin–orbit splitting of 1D bands in Si(553)-Au surface has been proven.•Different orientations of spin polarization in both bands have been revealed.•The unequal magnitude of splitting of the bands is related to specific charge distribution and orbitals generating these bands. A doublet of one-dimensional metallic bands on Au-stabilized Si(553) surface features different splitting due to the spin–orbit interaction. Density functional theory calculations reveal the origin of unequal magnitude of the splitting. Furthermore, different orientations of spin polarizations, almost perpendicular to each other, in both spin–orbit split bands are discovered. These observations are consistent with the Rashba effect and induced electric field in the system with out-of-plane and in-plane components. The results of calculations are confirmed by spin- and angle-resolved photoelectron spectroscopy measurements. The Si(553)-Au surface appears as a unique 1D Rashba system.