Spintronique avec des matériaux 2D

par Victor Zatko

Projet de thèse en Physique

Sous la direction de Pierre Seneor et de Bruno Dlubak.

Thèses en préparation à Paris Saclay , dans le cadre de École doctorale Physique en Île-de-France (Paris) , en partenariat avec Unité mixte de physique CNRS/Thales (Palaiseau) (laboratoire) et de Université Paris-Sud (établissement de préparation de la thèse) depuis le 01-12-2018 .


  • Résumé

    Spintronics is a paradigm focusing on spin as the information vector in fast and ultra-low-power non-volatile devices such as the new spin-transfer-torque Magnetic Radom Access Memory (MRAM). Beyond its widely distributed applications, spintronics aims at providing more complex architectures and a powerful beyond CMOS solution from storage to quantum information. The recent discovery of graphene, and other 2D materials such as hexagonal boron nitride (h-BN), has opened novel exciting opportunities in terms of functionalities and performances for spintronics devices. This has unleashed the potential of 2D materials such as graphene for spintronics. We demonstrated that highly efficient spin information transport can occur in graphene, with large spin signals and macroscopic spin diffusion lengths highlighting graphene's interest as a platform for spin transport[1]. However, unexpected new potentials can emerge. For example an atomically thin graphene layer was shown to be enough to prevent the oxidation of a metal underneath [2]. This enabled its use in magnetic tunnel junctions, developping novel wet/ambient low-cost processes for spintronics devices. For example, we introduced the Atomic Layer Deposition (ALD) technique already used intensively in microelectronics industry but absent from spintronics[3] even giving prospect in molecular spintronics. A new enhanced spin filtering property with almost full spin polarization reversal was also demonstrated [2,3]. This work has recently been extended to new 2D materials giving rise to the field of 2D material magnetic tunnel junctions[4]. We want to pursue our work in this direction, unraveling new potential for spintronics and beyond with the use of new 2D materials. The internship will focus on graphene and its extension to other 2D materials such as transition metals dichalcogenides (TMDC) or emerging semiconductors such as black phosphorous... and their heterostructures.

  • Titre traduit

    Spintronics with 2D materials


  • Résumé

    Spintronics is a paradigm focusing on spin as the information vector in fast and ultra-low-power non-volatile devices such as the new spin-transfer-torque Magnetic Radom Access Memory (MRAM). Beyond its widely distributed applications, spintronics aims at providing more complex architectures and a powerful beyond CMOS solution from storage to quantum information. The recent discovery of graphene, and other 2D materials such as hexagonal boron nitride (h-BN), has opened novel exciting opportunities in terms of functionalities and performances for spintronics devices. This has unleashed the potential of 2D materials such as graphene for spintronics. We demonstrated that highly efficient spin information transport can occur in graphene, with large spin signals and macroscopic spin diffusion lengths highlighting graphene's interest as a platform for spin transport[1]. However, unexpected new potentials can emerge. For example an atomically thin graphene layer was shown to be enough to prevent the oxidation of a metal underneath [2]. This enabled its use in magnetic tunnel junctions, developping novel wet/ambient low-cost processes for spintronics devices. For example, we introduced the Atomic Layer Deposition (ALD) technique already used intensively in microelectronics industry but absent from spintronics[3] even giving prospect in molecular spintronics. A new enhanced spin filtering property with almost full spin polarization reversal was also demonstrated [2,3]. This work has recently been extended to new 2D materials giving rise to the field of 2D material magnetic tunnel junctions[4]. We want to pursue our work in this direction, unraveling new potential for spintronics and beyond with the use of new 2D materials. The internship will focus on graphene and its extension to other 2D materials such as transition metals dichalcogenides (TMDC) or emerging semiconductors such as black phosphorous... and their heterostructures.