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- Title
Efficient Spin-to-Charge Interconversion in Weyl Semimetal TaP at Room Temperature.
- Authors
Mendes, Joaquim B. S.; Vieira, Andriele S.; Cunha, Rafael O.; Ferreira, Sukarno O.; dos Reis, Ricardo D.; Schmidt, Marcus; Nicklas, Michael; Rezende, Sergio M.; Azevedo, Antonio
- Abstract
In this paper, spin-to-charge current conversion properties in the Weyl semimetal TaP by means of the inverse Rashba-Edelstein effect (IREE) with the interfacial integration of this quantum material with the ferromagnetic metal Permalloy (Py = Ni81Fe19) are presented. The spin currents are generated in the Py layer by the spin pumping effect (SPE) from microwave-driven ferromagnetic resonance and are detected by a dc voltage along the TaP crystal, at room temperature. A field-symmetric voltage signal is observed without the contamination of asymmetrical lines due to spin rectification effects observed in studies using metallic ferromagnets. The observed voltage is attributed to spin-to-charge current conversion based on the IREE, made possible by the spin-orbit coupling induced intrinsically by the bulk band structure of Weyl semimetals. The measured IREE coefficient λIREE = (0.30 ± 0.01) nm is two orders of magnitude larger than in graphene and is comparable to or larger than the values reported for some metallic interfaces and for several topological insulators.
- Subjects
FERROMAGNETIC resonance; FERROMAGNETIC materials; TOPOLOGICAL insulators; SEMIMETALS; SPIN-orbit interactions; TEMPERATURE; SPIN waves
- Publication
Advanced Materials Interfaces, 2022, Vol 9, Issue 36, p1
- ISSN
2196-7350
- Publication type
Article
- DOI
10.1002/admi.202201716