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- Title
Strong coupling between a permalloy ferromagnetic contact and helical edge channel in a narrow HgTe quantum well.
- Authors
Kononov, A.; Egorov, S.; Kvon, Z.; Mikhailov, N.; Dvoretsky, S.; Deviatov, E.
- Abstract
We experimentally investigate spin-polarized electron transport between a permalloy ferromagnet and the edge of a two-dimensional electron system with band inversion, realized in a narrow, 8 nm wide, HgTe quantum well. In zero magnetic field, we observe strong asymmetry of the edge potential distribution with respect to the ferromagnetic ground lead. This result indicates that the helical edge channel, specific for the structures with band inversion even at the conductive bulk, is strongly coupled to the ferromagnetic side contact, possibly due to the effects of proximity magnetization. This allows selective and spin-sensitive contacting of helical edge states.
- Subjects
FERROMAGNETISM; MERCURY telluride; QUANTUM wells; MAGNETIC coupling; POTENTIAL distribution; MAGNETIZATION
- Publication
Journal of Experimental & Theoretical Physics, 2016, Vol 123, Issue 5, p875
- ISSN
1063-7761
- Publication type
Article
- DOI
10.1134/S1063776116130045