Long Spin Diffusion Length in Few-Layer Graphene Flakes

Yan, W.; Phillips, L.?C.; Barbone, M.; H�m�l�inen, S.?J.; Lombardo, A.; Ghidini, M.; Moya, X.; Maccherozzi, F.; van Dijken, S.; Dhesi, S.?S.; Ferrari, A.?C.; Mathur, N.?D.

Abstract

© 2016 American Physical Society. We report a spin valve with a few-layer graphene flake bridging highly spin-polarized La0.67Sr0.33MnO3 electrodes, whose surfaces are kept clean during lithographic definition. Sharp magnetic switching is verified using photoemission electron microscopy with x-ray magnetic circular dichroism contrast. A naturally occurring high interfacial resistance ∼12 MΩ facilitates spin injection, and a large resistive switching (0.8 MΩ at 10 K) implies a 70-130 μm spin diffusion length that exceeds previous values obtained with sharp-switching electrodes.

Citation

Yan, W., Phillips, L., Barbone, M., Hämäläinen, S., Lombardo, A., Ghidini, M., Moya, X., Maccherozzi, F., van Dijken, S., Dhesi, S., Ferrari, A., & Mathur, N. (2016). Long Spin Diffusion Length in Few-Layer Graphene Flakes. Physical Review Letters, 117(14), https://doi.org/10.1103/physrevlett.117.147201

• Journal Article Type: Article
• Acceptance Date: Jun 29, 2016
• Online Publication Date: Sep 27, 2016
• Publication Date: Sep 27, 2016
• Deposit Date: Nov 14, 2019
• Journal: Physical Review Letters
• Print ISSN: 0031-9007
• Electronic ISSN: 1079-7114
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 117
• Issue: 14
• DOI: https://doi.org/10.1103/physrevlett.117.147201
• Public URL: https://nottingham-repository.worktribe.com/output/3085772
• Publisher URL: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.147201