Out-of-plane spin-to-charge conversion at low temperatures in graphene/MoTe2 heterostructures
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Title: | Out-of-plane spin-to-charge conversion at low temperatures in graphene/MoTe2 heterostructures |
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Authors: | Ontoso, Nerea | Safeer, C. K. | Ingla-Aynés, Josep | Herling, Franz | Hueso, Luis E. | Calvo, M. Reyes | Casanova, Fèlix |
Research Group/s: | Física de la Materia Condensada |
Center, Department or Service: | Universidad de Alicante. Departamento de Física Aplicada | Universidad de Alicante. Instituto Universitario de Materiales |
Keywords: | Spin-to-charge conversion | Low temperatures | Graphene | MoTe2 | Heterostructures |
Issue Date: | 17-Jul-2023 |
Publisher: | American Institute of Physics |
Citation: | Applied Physics Letters. 2023, 123: 032401. https://doi.org/10.1063/5.0154149 |
Abstract: | Multi-directional spin-to-charge conversion—in which spin polarizations with different orientations can be converted into a charge current in the same direction—has been demonstrated in low-symmetry materials and interfaces. This is possible because, in these systems, spin-to-charge conversion can occur in unconventional configurations in which charge current, spin current, and polarization do not need to be mutually orthogonal. Here, we explore, in the low temperature regime, the spin-to-charge conversion in heterostructures of graphene with the low-symmetry 1T' phase of MoTe2. First, we observe the emergence of charge conversion for out-of-plane spins at temperatures below 100 K. This unconventional component is allowed by the symmetries of both MoTe2 and graphene and likely arises from spin Hall effect in the spin–orbit proximitized graphene. Moreover, we examine the low-temperature evolution of non-local voltage signals arising from the charge conversion of the two in-plane spin polarizations, which have been previously observed at higher temperature. As a result, we report omni-directional spin-to-charge conversion—for all spin polarization orientations—in graphene/MoTe2 heterostructures at low temperatures. |
Sponsor: | This work was supported by the Spanish MICINN under Project Nos. PID2021-122511OB-I00 and MAT2017-88377-C2-2-R and the Maria de Maeztu Units of Excellence Programme (Grant Nos. MDM-2016-0618 and CEX2020-001038-M); the “Valleytronics” Intel Science Technology Center; the Gipuzkoa Regional Council under Project No. 2021-CIEN-000037-01; and the European Union H2020 under the Marie Sklodowska-Curie Actions (Grant Nos. 0766025-QuESTech and 794982-2DSTOP). N.O. thanks the Spanish MICINN for support from a Ph.D. fellowship (Grant No. BES-2017-07963). J.I.-A. acknowledges support from the “Juan de la Cierva-Formación” program by the Spanish MICINN (Grant No. FJC2018-038688-I) for a postdoctoral fellowship. R.C. acknowledges funding from Generalitat Valenciana through Grant Nos. CIDEGENT/2018/004, IDIFEDER/2020/005, and IDIFEDER/2021/016. |
URI: | http://hdl.handle.net/10045/136511 |
ISSN: | 0003-6951 (Print) | 1077-3118 (Online) |
DOI: | 10.1063/5.0154149 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Rights: | © 2023 Author(s). Published under an exclusive license by AIP Publishing. |
Peer Review: | si |
Publisher version: | https://doi.org/10.1063/5.0154149 |
Appears in Collections: | INV - Física de la Materia Condensada - Artículos de Revistas Research funded by the EU |
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Ontoso_etal_2023_ApplPhysLett.pdf | Embargo 12 meses (acceso abierto: 18 jul. 2024) | 1,97 MB | Adobe PDF | Open Request a copy |
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