2026-06-27T12:39:14Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/84642024-09-04T16:53:39Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Anadón, Alberto author Gudín, Adrián author Guerrero, Rubén author Arnay, Icíar author Guedeja-Marrón Gil, Alejandra author Jiménez Cavero, Pilar author Díez Toledano, José Manuel author Ajejas, Fernando author Varela Del Arco, María author Petit Watelot, Sebastien author Lucas, Irene author Morellón, Luis author Algarabel, Pedro Antonio author Ibarra, Manuel Ricardo author Miranda, Rodolfo author 2021-06-01 Spin Hall and Rashba-Edelstein effects, which are spin-to-charge conversion phenomena due to spin-orbit coupling (SOC), are attracting increasing interest as pathways to manage rapidly and at low consumption cost the storage and processing of a large amount of data in spintronic devices as well as more efficient energy harvesting by spin-caloritronics devices. Materials with large SOC, such as heavy metals (HMs), are traditionally employed to get large spin-to-charge conversion. More recently, the use of graphene (gr) in proximity with large SOC layers has been proposed as an efficient and tunable spin transport channel. Here, we explore the role of a graphene monolayer between Co and a HM and its interfacial spin transport properties by means of thermo-spin measurements. The gr/HM (Pt and Ta) stacks have been prepared on epitaxial Ir(111)/Co(111) structures grown on sapphire crystals, in which the spin detector (i.e., top HM) and the spin injector (i.e., Co) are all grown in situ under controlled conditions and present clean and sharp interfaces. We find that a gr monolayer retains the spin current injected into the HM from the bottom Co layer. This has been observed by detecting a net reduction in the sum of the spin Seebeck and interfacial contributions due to the presence of gr and independent from the spin Hall angle sign of the HM used. 2166-532X 10.1063/5.0048612 https://hdl.handle.net/20.500.14352/8464 http://dx.doi.org/10.1063/5.0048612 https://aip.scitation.org/ Engineering the spin conversion in graphene monolayer epitaxial structures