Theoretical investigation of the applicability of the Meservey-Tedrow technique to the surface states of topological insulators

Götte M, Dahm T (2019)
NEW JOURNAL OF PHYSICS 21(12): 123042.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
The spin polarization of topological surface states is of high interest for possible applications in spintronics. At present, the only technique capable to measure the surface state spin texture is spin and angle resolved photoemission spectroscopy (SARPES). However, values reported by SARPES differed strongly. An established technique to measure the spin polarization of ferromagnetic materials is the so-called Meservey-Tedrow technique, which is based on spin dependent tunneling from a superconducting electrode to a ferromagnet. Here, we theoretically investigate how the Meservey-Tedrow technique can be adapted to topological insulators. We demonstrate that with a specific device geometry it is possible to determine the in-plane component of the spin polarization of topological surface states. More complex device geometries can access the full momentum dependence of the spin polarization. We also show that it is possible to extract the spin-flip scattering rate of surface electrons with the same devices.
Stichworte
topological insulators; Meservey-Tedrow technique; tunneling; spectroscopy; spin polarization; spin-flip scattering rate
Erscheinungsjahr
2019
Zeitschriftentitel
NEW JOURNAL OF PHYSICS
Band
21
Ausgabe
12
Art.-Nr.
123042
ISSN
1367-2630
Page URI
https://pub.uni-bielefeld.de/record/2941906

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Götte M, Dahm T. Theoretical investigation of the applicability of the Meservey-Tedrow technique to the surface states of topological insulators. NEW JOURNAL OF PHYSICS. 2019;21(12): 123042.
Götte, M., & Dahm, T. (2019). Theoretical investigation of the applicability of the Meservey-Tedrow technique to the surface states of topological insulators. NEW JOURNAL OF PHYSICS, 21(12), 123042. doi:10.1088/1367-2630/ab5ed0
Götte, M., and Dahm, T. (2019). Theoretical investigation of the applicability of the Meservey-Tedrow technique to the surface states of topological insulators. NEW JOURNAL OF PHYSICS 21:123042.
Götte, M., & Dahm, T., 2019. Theoretical investigation of the applicability of the Meservey-Tedrow technique to the surface states of topological insulators. NEW JOURNAL OF PHYSICS, 21(12): 123042.
M. Götte and T. Dahm, “Theoretical investigation of the applicability of the Meservey-Tedrow technique to the surface states of topological insulators”, NEW JOURNAL OF PHYSICS, vol. 21, 2019, : 123042.
Götte, M., Dahm, T.: Theoretical investigation of the applicability of the Meservey-Tedrow technique to the surface states of topological insulators. NEW JOURNAL OF PHYSICS. 21, : 123042 (2019).
Götte, Matthias, and Dahm, Thomas. “Theoretical investigation of the applicability of the Meservey-Tedrow technique to the surface states of topological insulators”. NEW JOURNAL OF PHYSICS 21.12 (2019): 123042.

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