This title appears in the Scientific Report :
2020
Please use the identifier:
http://hdl.handle.net/2128/26376 in citations.
Please use the identifier: http://dx.doi.org/10.1038/s41535-020-00293-3 in citations.
Orbital-enhanced warping effect in px,py-derived Rashba spin splitting of monatomic bismuth surface alloy
Orbital-enhanced warping effect in px,py-derived Rashba spin splitting of monatomic bismuth surface alloy
Spin-split Rashba bands have been exploited to efficiently control the spin degree of freedom of moving electrons, which possesses a great potential in frontier applications of designing spintronic devices and processing spin-based information. Given an intrinsic breaking of inversion symmetry and s...
Saved in:
Personal Name(s): | Chen, Guan-Yu |
---|---|
Huang, Angus / Lin, Yen-Hui / Chen, Chia-Ju / Lin, Deng-Sung / Chang, Po-Yao / Jeng, Horng-Tay (Corresponding author) / Bihlmayer, Gustav / Hsu, Pin-Jui (Corresponding author) | |
Contributing Institute: |
JARA - HPC; JARA-HPC JARA-FIT; JARA-FIT Quanten-Theorie der Materialien; IAS-1 Quanten-Theorie der Materialien; PGI-1 |
Published in: | npj quantum materials, 5 (2020) 1, S. 89 |
Imprint: |
[London]
Nature Publishing Group
2020
|
DOI: |
10.1038/s41535-020-00293-3 |
Document Type: |
Journal Article |
Research Program: |
Controlling Configuration-Based Phenomena Controlling Spin-Based Phenomena |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1038/s41535-020-00293-3 in citations.
Spin-split Rashba bands have been exploited to efficiently control the spin degree of freedom of moving electrons, which possesses a great potential in frontier applications of designing spintronic devices and processing spin-based information. Given an intrinsic breaking of inversion symmetry and sizeable spin–orbit interaction, two-dimensional (2D) surface alloys formed by heavy metal elements exhibit a pronounced Rashba-type spin splitting of the surface states. Here, we have revealed the essential role of atomic orbital symmetry in the hexagonally warped Rashba spin-split surface state of the 3–√×3–√R300 BiCu2 monatomic alloy by scanning tunneling spectroscopy (STS) and density functional theory (DFT). From dI/dU spectra and calculated band structures, three hole-like Rashba-split bands hybridized from distinct orbital symmetries have been identified in the unoccupied energy region. Because of the hexagonally deformed Fermi surface, quasi-particle interference (QPI) mappings have resolved scattering channels opened from interband transitions of px,py (mj = 1/2) band. In contrast to the s,pz-derived band, the hexagonal warping is predominately accompanied by substantial out-of-plane spin polarization Sz up to 24% in the dispersion of px,py (mj = 1/2) band with an in-plane orbital symmetry. |