SKM 2021 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 6: Focus Session: Spin-Charge Interconversion (joint session MA/HL)
MA 6.3: Hauptvortrag
Dienstag, 28. September 2021, 14:30–15:00, H5
Electrical and thermal generation of spin currents by magnetic graphene — •B.J van Wees1, T.S. Ghiasi1, A.A. Kaverzin1, D.K. de Wal1, A.H. Dismukes2, and Bart Wees2 — 1Zernike Institute for Advanced Materials, Groningen, The Netherlands — 2Department of Chemistry, Colombia University, New York, NY, USA
I will introduce proximity effects in Van der Waals heterostructures of graphene and materials with strong spin orbit interaction or magnetic 2D materials. Then I will discuss recent experiments [1] where we demonstrate with (non)local spin transport experiments that the proximity of the antiferromagnet CrSBr introduces a strong spin dependent conductivity (with a polarization of about 24%) in (bilayer) graphene. The strength of the exchange field is estimated to be about 170T, implying that the graphene has become magnetic by proximity. This also resulted in the observation of a spin-dependent Seebeck effect. These results were recently confirmed using non-magnetic injector/detector electrodes [2] Fimally I will indicate some new (device) functionalities made possible by this strong proximity inducedspin-charge coupling in graphene [1] T.S. Ghiasi et al., Nature Nanotech. 16, 788, Vol 18, 2021 [2] A.A. kaverzin et al., in preparation