Three-Dimensional Spin Rotations at the Fermi Surface of a Strongly Spin-Orbit Coupled Surface System
| Autor: | Ralph Claessen, P. Höpfner, J. Schäfer, Bartosz Slomski, Werner Hanke, L. Patthey, Jan Hugo Dil, C. Loho, Fabian Meier, C. Blumenstein, Andrzej Fleszar |
|---|---|
| Přispěvatelé: | University of Zurich, Höpfner, P |
| Rok vydání: | 2012 |
| Předmět: |
Physics
Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Spin polarization 530 Physics FOS: Physical sciences General Physics and Astronomy Fermi surface 10192 Physics Institute 02 engineering and technology Zero field splitting 021001 nanoscience & nanotechnology 01 natural sciences 3100 General Physics and Astronomy 3. Good health Condensed Matter - Strongly Correlated Electrons Planar 0103 physical sciences Spin Hall effect Condensed Matter::Strongly Correlated Electrons Texture (crystalline) 010306 general physics 0210 nano-technology Anisotropy Spin-½ |
| Zdroj: | PHYSICAL REVIEW LETTERS |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.108.186801 |
| Popis: | The spin texture of the metallic two-dimensional electron system (root3 x root3)-Au/Ge(111) is revealed by fully three-dimensional spin-resolved photoemission, as well as by density functional calculations. The large hexagonal Fermi surface, generated by the Au atoms, shows a significant splitting due to spin-orbit interactions. The planar components of the spin exhibit helical character, accompanied by a strong out-of-plane spin component with alternating signs along the six Fermi surface sections. Moreover, in-plane spin rotations towards a radial direction are observed close to the hexagon corners. Such a threefold-symmetric spin pattern is not described by the conventional Rashba model. Instead, it reveals an interplay with Dresselhaus-like spin-orbit effects as a result of the crystalline anisotropies. Comment: 5 pages, 4 figures, accepted at Physical Review Letters |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|