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Spin-texture inversion in the giant Rashba semiconductor BiTeI
- Source :
- Nature communications. 2016. Vol. 7. P. 11621 (1-7), Nature Communications, Nature Communications, Vol 7, Iss 1, Pp 1-7 (2016), Addi. Archivo Digital para la Docencia y la Investigación, instname, Digital.CSIC: Repositorio Institucional del CSIC, Consejo Superior de Investigaciones Científicas (CSIC), Digital.CSIC. Repositorio Institucional del CSIC
- Publication Year :
- 2016
-
Abstract
- Semiconductors with strong spin–orbit interaction as the underlying mechanism for the generation of spin-polarized electrons are showing potential for applications in spintronic devices. Unveiling the full spin texture in momentum space for such materials and its relation to the microscopic structure of the electronic wave functions is experimentally challenging and yet essential for exploiting spin–orbit effects for spin manipulation. Here we employ a state-of-the-art photoelectron momentum microscope with a multichannel spin filter to directly image the spin texture of the layered polar semiconductor BiTeI within the full two-dimensional momentum plane. Our experimental results, supported by relativistic ab initio calculations, demonstrate that the valence and conduction band electrons in BiTeI have spin textures of opposite chirality and of pronounced orbital dependence beyond the standard Rashba model, the latter giving rise to strong optical selection-rule effects on the photoelectron spin polarization. These observations open avenues for spin-texture manipulation by atomic-layer and charge carrier control in polar semiconductors.<br />This work was supported by DFG (through SFB 1170 ‘ToCoTronics’) and through FOR1162 (P3). We acknowledge the support by the Basque Departamento de Educacion, UPV/EHU (Grant Number IT-756-13), Spanish Ministerio de Economia y Competitividad (MINECO Grant Number FIS2013-48286-C2-2-P), Tomsk State University Academic D.I. Mendeleev Fund Program in 2015 (Research Grant Number 8.1.05.2015), the Russian Foundation for Basic Research (Grant Numbers 15-02-01797 and 15-02-589 02717). Partial support by the Saint Petersburg State University (Grant Number 15.61.202.2015) is also acknowledged.
- Subjects :
- tipological insulators
Science
General Physics and Astronomy
Position and momentum space
02 engineering and technology
Electron
01 natural sciences
General Biochemistry, Genetics and Molecular Biology
Article
Condensed Matter::Materials Science
спиновая текстура поверхностных слоев
surface-states
orbital texture
0103 physical sciences
010306 general physics
Wave function
approximation
ddc:537
Physics
Multidisciplinary
Spintronics
Spin polarization
Condensed matter physics
Condensed Matter::Other
полярные полупроводники
Spin engineering
General Chemistry
Spin–orbit interaction
021001 nanoscience & nanotechnology
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
field
effect transistor
manipulation
transition-metal dichalcogenides
augmented-wave method
Charge carrier
Condensed Matter::Strongly Correlated Electrons
спинтроника
0210 nano-technology
photoemission
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Nature communications. 2016. Vol. 7. P. 11621 (1-7), Nature Communications, Nature Communications, Vol 7, Iss 1, Pp 1-7 (2016), Addi. Archivo Digital para la Docencia y la Investigación, instname, Digital.CSIC: Repositorio Institucional del CSIC, Consejo Superior de Investigaciones Científicas (CSIC), Digital.CSIC. Repositorio Institucional del CSIC
- Accession number :
- edsair.doi.dedup.....713d5a33665923da6611ba820a26c074