This title appears in the Scientific Report :
2016
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevB.93.035110 in citations.
Please use the identifier: http://hdl.handle.net/2128/9805 in citations.
Scattering properties of the three-dimensional topological insulator Sb 2 Te 3 : Coexistence of topologically trivial and nontrivial surface states with opposite spin-momentum helicityph
Scattering properties of the three-dimensional topological insulator Sb 2 Te 3 : Coexistence of topologically trivial and nontrivial surface states with opposite spin-momentum helicityph
The binary chalcogenides Bi2Te3 and Bi2Se3 are the most widely studied topological insulators. Although the quantum anomalous Hall effect has recently been observed in magnetically doped Sb2Te3, this compound has been studied to a much lesser extent. Here, by using energy-resolved quasiparticle inte...
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Personal Name(s): | Sessi, P. (Corresponding author) |
---|---|
Storz, O. / Bathon, T. / Wilfert, S. / Kokh, K. A. / Tereshchenko, O. E. / Bihlmayer, G. / Bode, M. | |
Contributing Institute: |
JARA-FIT; JARA-FIT Quanten-Theorie der Materialien; PGI-1 Quanten-Theorie der Materialien; IAS-1 |
Published in: | Physical Review B Physical review / B, 93 93 (2016 2016) 3 3, S. 035110 035110 |
Imprint: |
College Park, Md.
APS
2016
|
DOI: |
10.1103/PhysRevB.93.035110 |
Document Type: |
Journal Article |
Research Program: |
Controlling Configuration-Based Phenomena Controlling Spin-Based Phenomena |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/9805 in citations.
The binary chalcogenides Bi2Te3 and Bi2Se3 are the most widely studied topological insulators. Although the quantum anomalous Hall effect has recently been observed in magnetically doped Sb2Te3, this compound has been studied to a much lesser extent. Here, by using energy-resolved quasiparticle interference mapping, we investigate the scattering events of pristine Sb2Te3 surfaces. We find that, in addition to the Dirac fermions, another strongly spin-polarized surface resonance emerges at higher energies in the unoccupied electronic states. Although the two surface states are of different origin, i.e., topologically protected and trivial, respectively, both show strongly directional scattering properties and absence of backscattering. A comparison with ab initio calculations demonstrates that this is a direct consequence of their spin-momentum–locked spin texture which is found to exhibit an opposite rotational sense for the trivial state and the Dirac state. |