Large Multidirectional Spin-to-Charge Conversion in Low-Symmetry Semimetal MoTe 2 at Room Temperature.

Autor:	Safeer CK; CIC nanoGUNE , 20018 Donostia-San Sebastian , Basque Country , Spain., Ontoso N; CIC nanoGUNE , 20018 Donostia-San Sebastian , Basque Country , Spain., Ingla-Aynés J; CIC nanoGUNE , 20018 Donostia-San Sebastian , Basque Country , Spain., Herling F; CIC nanoGUNE , 20018 Donostia-San Sebastian , Basque Country , Spain., Pham VT; CIC nanoGUNE , 20018 Donostia-San Sebastian , Basque Country , Spain., Kurzmann A; Solid State Physics Laboratory , ETH Zurich , 8093 Zurich , Switzerland., Ensslin K; Solid State Physics Laboratory , ETH Zurich , 8093 Zurich , Switzerland., Chuvilin A; CIC nanoGUNE , 20018 Donostia-San Sebastian , Basque Country , Spain.; IKERBASQUE, Basque Foundation for Science , 48013 Bilbao , Basque Country , Spain., Robredo I; Donostia International Physics Center (DIPC) , 20018 Donostia-San Sebastian , Basque Country , Spain.; Department of Condensed Matter Physics , University of the Basque Country (UPV/EHU) , 48080 Bilbao , Basque Country , Spain., Vergniory MG; IKERBASQUE, Basque Foundation for Science , 48013 Bilbao , Basque Country , Spain.; Donostia International Physics Center (DIPC) , 20018 Donostia-San Sebastian , Basque Country , Spain., de Juan F; IKERBASQUE, Basque Foundation for Science , 48013 Bilbao , Basque Country , Spain.; Donostia International Physics Center (DIPC) , 20018 Donostia-San Sebastian , Basque Country , Spain., Hueso LE; CIC nanoGUNE , 20018 Donostia-San Sebastian , Basque Country , Spain.; IKERBASQUE, Basque Foundation for Science , 48013 Bilbao , Basque Country , Spain., Calvo MR; CIC nanoGUNE , 20018 Donostia-San Sebastian , Basque Country , Spain.; IKERBASQUE, Basque Foundation for Science , 48013 Bilbao , Basque Country , Spain.; Departamento de Física Aplicada , Universidad de Alicante , 03690 Alicante , Spain., Casanova F; CIC nanoGUNE , 20018 Donostia-San Sebastian , Basque Country , Spain.; IKERBASQUE, Basque Foundation for Science , 48013 Bilbao , Basque Country , Spain.
Jazyk:	angličtina
Zdroj:	Nano letters [Nano Lett] 2019 Dec 11; Vol. 19 (12), pp. 8758-8766. Date of Electronic Publication: 2019 Nov 06.
DOI:	10.1021/acs.nanolett.9b03485
Abstrakt:	Efficient and versatile spin-to-charge current conversion is crucial for the development of spintronic applications, which strongly rely on the ability to electrically generate and detect spin currents. In this context, the spin Hall effect has been widely studied in heavy metals with strong spin-orbit coupling. While the high crystal symmetry in these materials limits the conversion to the orthogonal configuration, unusual configurations are expected in low-symmetry transition-metal dichalcogenide semimetals, which could add flexibility to the electrical injection and detection of pure spin currents. Here, we report the observation of spin-to-charge conversion in MoTe 2 flakes, which are stacked in graphene lateral spin valves. We detect two distinct contributions arising from the conversion of two different spin orientations. In addition to the conventional conversion where the spin polarization is orthogonal to the charge current, we also detect a conversion where the spin polarization and the charge current are parallel. Both contributions, which could arise either from bulk spin Hall effect or surface Edelstein effect, show large efficiencies comparable to the best spin Hall metals and topological insulators. Our finding enables the simultaneous conversion of spin currents with any in-plane spin polarization in one single experimental configuration.
Databáze:	MEDLINE
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