Charge to spin conversion in van der Waals metal NbSe2
Artikel i vetenskaplig tidskrift, 2022

Quantum materials with a large charge current-induced spin polarization are promising for next-generation all-electrical spintronic science and technology. Van der Waals metals with high spin-orbit coupling and spin textures have attracted significant attention for an efficient charge-to-spin conversion process. Here, we demonstrate the electrical generation of spin polarization in NbSe2 up to room temperature. Characterization of NbSe2 shows superconducting transition temperature, Tc ∼7 K. To probe the current-induced spin polarization in NbSe2, we used a graphene-based non-local spin-valve device, where the spin-polarization in NbSe2 is efficiently injected and detected using non-local spin-switch and Hanle spin precession measurements. A significantly higher charge-spin conversion in NbSe2 is observed at a lower temperature. Systematic measurements provide the possible origins of the spin polarization to be predominantly due to the spin Hall effect or Rashba-Edelstein effect in NbSe2, considering different symmetry-allowed charge-spin conversion processes.

Författare

Anamul Md Hoque

2D-Tech

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Bing Zhao

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

2D-Tech

Dmitrii Khokhriakov

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

2D-Tech

Pranaba Muduli Kishor

Indian Institute of Technology

Saroj Prasad Dash

2D-Tech

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Applied Physics Letters

0003-6951 (ISSN) 1077-3118 (eISSN)

Vol. 121 24 242404

2D material-baserad teknologi för industriella applikationer (2D-TECH)

GKN Aerospace Sweden (2D-tech), 2021-01-01 -- 2024-12-31.

VINNOVA (2019-00068), 2020-05-01 -- 2024-12-31.

Drivkrafter

Hållbar utveckling

Ämneskategorier

Fysikalisk kemi

Atom- och molekylfysik och optik

Annan fysik

Den kondenserade materiens fysik

Styrkeområden

Materialvetenskap

DOI

10.1063/5.0121577

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Senast uppdaterat

2024-05-29