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Observation of inverse spin Hall effect in bismuth selenide

Praveen Deorani, Jaesung Son, Karan Banerjee, Nikesh Koirala, Matthew Brahlek, Seongshik Oh, Hyunsoo Yang
2014 Physical Review B  

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2014 pre-print arXiv:1404.1146v1 fatcat:wo23owrkt5djznn43qggqp5c6e

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2014 accepted
arXiv:1404.1146v2 fatcat:gnrjuatplnhrbc5agkawrdmh2e
Bismuth Selenide (Bi2Se3) is a topological insulator exhibiting helical spin polarization and strong spin-orbit coupling. The spin-orbit coupling links the charge current to spin current via the spin Hall effect (SHE). We demonstrate a Bi2Se3 spin detector by injecting the pure spin current from a magnetic permalloy layer to a Bi2Se3 thin film and detect the inverse SHE in Bi2Se3. The spin Hall angle of Bi2Se3 is found to be 0.0093 and the spin diffusion length in Bi2Se3 to be 6.2 nm at room
more » ... perature. Our results suggest that topological insulators with strong spin-orbit coupling can be used in functional spintronic devices.
doi:10.1103/physrevb.90.094403 fatcat:ypem3hz3kfemhpvvxyqqq2xgdm
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Praveen Deorani, Jaesung Son, Karan Banerjee, Nikesh Koirala, Matthew Brahlek, Seongshik Oh, Hyunsoo Yang. "Observation of inverse spin Hall effect in bismuth selenide." Physical Review B 90.9 (2014)