TY  - JOUR
AU  - Sheverdyaeva, Polina M.
AU  - Hogan, Conor
AU  - Bihlmayer, Gustav
AU  - Fujii, Jun
AU  - Vobornik, Ivana
AU  - Jugovac, Matteo
AU  - Kundu, Asish K.
AU  - Gardonio, Sandra
AU  - Benher, Zipporah Rini
AU  - Santo, Giovanni Di
AU  - Gonzalez, Sara
AU  - Petaccia, Luca
AU  - Carbone, Carlo
AU  - Moras, Paolo
TI  - Giant and Tunable Out-of-Plane Spin Polarization of Topological Antimonene
JO  - Nano letters
VL  - 23
IS  - 14
SN  - 1530-6984
CY  - Washington, DC
PB  - ACS Publ.
M1  - FZJ-2023-02920
SP  - 6277 - 6283
PY  - 2023
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - 37459226
UR  - <Go to ISI:>//WOS:001030480300001
DO  - DOI:10.1021/acs.nanolett.3c00153
UR  - https://juser.fz-juelich.de/record/1009615
ER  -