Pietanesi, Laura and Marganska, Magdalena and Mayer, Thomas and Barth, Michael and Chen, Lin and Zou, Ji and Weindl, Adrian and Liebig, Alexander and Diaz-Pardo, Rebeca and Suri, Dhavala and Schmid, Florian and Giessibl, Franz J. and Richter, Klaus and Tserkovnyak, Yaroslav and Kronseder, Matthias and Back, Christian H. (2024) Tracing Dirac points of topological surface states by ferromagnetic resonance. PHYSICAL REVIEW B, 109 (6): 064424. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
Ferromagnetic resonance is used to reveal features of the buried electronic band structure at interfaces between ferromagnetic metals and topological insulators. By monitoring the evolution of magnetic damping, the application of this method to a hybrid structure consisting of a ferromagnetic layer and a 3D topological insulator reveals a clear fingerprint of the Dirac point and exhibits additional features of the interfacial band structure not otherwise observable. The underlying spin-pumping mechanism is discussed in the framework of dissipation of angular momentum by topological surface states (TSSs). Tuning of the Fermi level within the TSS was verified both by varying the stoichiometry of the topological insulator layer and by electrostatic backgating and the damping values obtained in both cases show a remarkable agreement. The high-energy resolution of this method additionally allows us to resolve the energetic shift of the local Dirac points generated by local variations of the electrostatic potential. Calculations based on the chiral tunneling process naturally occurring in TSSs agree well with the experimental results.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | P-N-JUNCTION; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter Physics > Institute of Experimental and Applied Physics > Chair Professor Giessibl > Group Franz J. Giessibl |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 Dec 2025 07:19 |
| Last Modified: | 09 Dec 2025 07:19 |
| URI: | https://pred.uni-regensburg.de/id/eprint/65006 |
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