Observation of inverse spin Hall effect in bismuth selenide

Praveen Deorani; Jaesung Son; Karan Banerjee; Nikesh Koirala; Matthew Brahlek; Seongshik Oh; Hyunsoo Yang

doi:10.1103/PhysRevB.90.094403

Observation of inverse spin Hall effect in bismuth selenide

Materials Science 2015-06-19 v2 Mesoscale and Nanoscale Physics

Authors: Praveen Deorani , Jaesung Son , Karan Banerjee , Nikesh Koirala , Matthew Brahlek , Seongshik Oh , Hyunsoo Yang

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Abstract

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 temperature. Our results suggest that topological insulators with strong spin-orbit coupling can be used in functional spintronic devices.

Keywords

inverse spin Hall effect bismuth selenide topological insulator spin-orbit coupling spin current spintronics spin diffusion length

Cite

@article{arxiv.1404.1146,
  title  = {Observation of inverse spin Hall effect in bismuth selenide},
  author = {Praveen Deorani and Jaesung Son and Karan Banerjee and Nikesh Koirala and Matthew Brahlek and Seongshik Oh and Hyunsoo Yang},
  journal= {arXiv preprint arXiv:1404.1146},
  year   = {2015}
}

Observation of inverse spin Hall effect in bismuth selenide

Abstract

Keywords

Cite

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