This title appears in the Scientific Report :
2023
Please use the identifier:
http://dx.doi.org/10.1021/acs.nanolett.3c00153 in citations.
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2023-02920 in citations.
Giant and Tunable Out-of-Plane Spin Polarization of Topological Antimonene
Giant and Tunable Out-of-Plane Spin Polarization of Topological Antimonene
Topological insulators are bulk insulators with metallic and fully spin-polarized surface states displaying Dirac-like band dispersion. Due to spin-momentum locking, these topological surface states (TSSs) have a predominant in-plane spin polarization in the bulk fundamental gap. Here, we show by sp...
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Personal Name(s): | Sheverdyaeva, Polina M. (Corresponding author) |
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Hogan, Conor (Corresponding author) / Bihlmayer, Gustav / Fujii, Jun / Vobornik, Ivana / Jugovac, Matteo / Kundu, Asish K. / Gardonio, Sandra / Benher, Zipporah Rini / Santo, Giovanni Di / Gonzalez, Sara / Petaccia, Luca / Carbone, Carlo / Moras, Paolo | |
Contributing Institute: |
Elektronische Eigenschaften; PGI-6 Quanten-Theorie der Materialien; IAS-1 Quanten-Theorie der Materialien; PGI-1 |
Published in: | Nano letters, 23 (2023) 14, S. 6277 - 6283 |
Imprint: |
Washington, DC
ACS Publ.
2023
|
DOI: |
10.1021/acs.nanolett.3c00153 |
DOI: |
10.34734/FZJ-2023-02920 |
Document Type: |
Journal Article |
Research Program: |
Topological Matter |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2023-02920 in citations.
Topological insulators are bulk insulators with metallic and fully spin-polarized surface states displaying Dirac-like band dispersion. Due to spin-momentum locking, these topological surface states (TSSs) have a predominant in-plane spin polarization in the bulk fundamental gap. Here, we show by spin-resolved photoemission spectroscopy that the TSS of a topological insulator interfaced with an antimonene bilayer exhibits nearly full out-of-plane spin polarization within the substrate gap. We connect this phenomenon to a symmetry-protected band crossing of the spin-polarized surface states. The nearly full out-of-plane spin polarization of the TSS occurs along a continuous path in the energy–momentum space, and the spin polarization within the gap can be reversibly tuned from nearly full out-of-plane to nearly full in-plane by electron doping. These findings pave the way to advanced spintronics applications that exploit the giant out-of-plane spin polarization of TSSs. |