Engineering the spin conversion in graphene monolayer epitaxial structures

POSTER

Abstract

Heavy metals (HMs) and interfaces with spin texture are employed to get a large spin-to-charge conversion1. Graphene in proximity with those systems has been proposed as an efficient and tunable spin transport channel. We explore the role of a graphene monolayer (Grm) between Co and HM. The Co/Grm/HM stacks have been prepared on epitaxial Ir(111) structures grown on sapphire crystals, in which the spin detector (top-HM), and the spin injector (Co) are all grown in-situ under controlled conditions and present clean and sharp interfaces. We find that an intercalated Grm effectively reduced the spin current injected into the HM from the bottom Co layer. This has been observed by detecting a net reduction of the sum of the spin Seebeck and interfacial contributions due to the presence of Grm and independently from the spin Hall angle sign of the HM used2.

1. Rojas-Sánchez, J. C. & Fert, A. Compared Efficiencies of Conversions between Charge and Spin Current by Spin-Orbit Interactions in Two- and Three-Dimensional Systems. Phys. Rev. Appl. 11, 054049 (2019).

2. Anadón, A. R-S, J. C. et al. Engineering the spin conversion in graphene monolayer epitaxial structures. APL Mater. 9, 061113 (2021). Invited

*We acknowledge ANR-19-CE24-0016-01 (TOPTRONICS); PCI2019-111867-2 (SOgraphMEM)

Publication: Anadón, A. Rojas-Sánchez, J. C. et al. Engineering the spin conversion in graphene monolayer epitaxial structures. APL Mater. 9, 061113 (2021). Invited

Presenters

  • Juan-Carlos Rojas-Sanchez

    • Institut Jean Lamour, CNRS UMR 7198, Université de Lorraine, France
    • University of Lorraine, France
    • Institut Jean Lamour, CNRS UMR 7198, Université de Lorraine

Authors

  • Juan-Carlos Rojas-Sanchez

    • Institut Jean Lamour, CNRS UMR 7198, Université de Lorraine, France
    • University of Lorraine, France
    • Institut Jean Lamour, CNRS UMR 7198, Université de Lorraine

  • Alberto Anadon

    • Institut Jean Lamour, CNRS UMR 7198, Université de Lorraine, France

  • Adrián Gudín

    • IMDEA Nanociencia, C/Faraday 9, 28049 Madrid, Spain

  • Ruben Guerrero

    • IMDEA Nanociencia, C/Faraday 9, 28049 Madrid, Spain

  • Iciar Arnay

    • IMDEA Nanociencia, C/Faraday 9, 28049 Madrid, Spain

  • ALEJANDRA GUEDEJA-MARRON GIL

    • IMDEA Nanociencia, C/Faraday 9, 28049 Madrid, Spain

  • Pilar Jiménez

    • Instituto de Nanociencia y Materiales de Aragón, Universidad de Zaragoza and CSIC, 50018 Zaragoza, Spain

  • Jose Manuel Díez Toledano

    • IMDEA Nanociencia, C/Faraday 9, 28049 Madrid, Spain

  • Fernando Ajejas

    • IMDEA Nanociencia, C/Faraday 9, 28049 Madrid, Spain
    • University of California San Diego

  • María Varela

    • Departamento de Física de Materiales and Instituto Pluridisciplinar, Universidad Complutense de Madrid, 28040 Madrid, Spain

  • Sebastien Petit-Watelot

    • Institut Jean Lamour, CNRS UMR 7198, Université de Lorraine, France

  • Irene Lucas

    • Instituto de Nanociencia y Materiales de Aragón, Universidad de Zaragoza and CSIC, 50018 Zaragoza, Spain
    • Instituto de Nanociencia y Materiales de Aragón (INMA), Universidad de Zaragoza and Consejo Superior de Investigaciones Científicas, 50009 Zaragoza, Spain.

  • Luis Morellon

    • Instituto de Nanociencia y Materiales de Aragón, Universidad de Zaragoza and CSIC, 50018 Zaragoza, Spain
    • Instituto de Nanociencia y Materiales de Aragón (INMA), Universidad de Zaragoza and Consejo Superior de Investigaciones Científicas, 50009 Zaragoza, Spain.

  • Pedro Antonio Algarabel

    • Instituto de Nanociencia y Materiales de Aragón, Universidad de Zaragoza and CSIC, 50018 Zaragoza, Spain

  • Manuel Ricardo Ibarra

    • Instituto de Nanociencia y Materiales de Aragón, Universidad de Zaragoza and CSIC, 50018 Zaragoza, Spain

  • Rodolfo Miranda

    • IMDEA Nanociencia, C/Faraday 9, 28049 Madrid, Spain
    • Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), 28049 Madrid, Spain

  • Julio Camarero

    • IMDEA Nanociencia, C/Faraday 9, 28049 Madrid, Spain
    • IMDEA Nanociencia, c/ Faraday, 9, 28049 Madrid, Spain and Departamento de Física de la Materia Condensada and Instituto 'Nicolás Cabrera', UAM, 28049, Madrid, Spain

  • Paolo Perna

    • IMDEA Nanociencia, C/Faraday 9, 28049 Madrid, Spain