Artificial Graphene Spin Polarized Electrode for Magnetic Tunnel Junctions.
Victor ZatkoRegina GalceranMarta GalbiatiJulian PeiroFlorian GodelLisa-Marie KernDavid PerconteFatima IbrahimAli HallalMairbek ChshievBenjamin MartinezCarlos FronteraLluìs BalcellsPiran R KidambiJohn RobertsonStephan HofmannSophie CollinFrédéric PetroffMarie-Blandine MartinBruno DlubakPierre SeneorPublished in: Nano letters (2022)
2D materials offer the ability to expose their electronic structure to manipulations by a proximity effect. This could be harnessed to craft properties of 2D interfaces and van der Waals heterostructures in devices and quantum materials. We explore the possibility to create an artificial spin polarized electrode from graphene through proximity interaction with a ferromagnetic insulator to be used in a magnetic tunnel junction (MTJ). Ferromagnetic insulator/graphene artificial electrodes were fabricated and integrated in MTJs based on spin analyzers. Evidence of the emergence of spin polarization in proximitized graphene layers was observed through the occurrence of tunnel magnetoresistance. We deduced a spin dependent splitting of graphene's Dirac band structure (∼15 meV) induced by the proximity effect, potentially leading to full spin polarization and opening the way to gating. The extracted spin signals illustrate the potential of 2D quantum materials based on proximity effects to craft spintronics functionalities, from vertical MTJs memory cells to logic circuits.
Keyphrases
- room temperature
- ionic liquid
- single molecule
- density functional theory
- carbon nanotubes
- induced apoptosis
- transition metal
- risk assessment
- working memory
- mass spectrometry
- endoplasmic reticulum stress
- oxidative stress
- gold nanoparticles
- cell death
- signaling pathway
- climate change
- cell cycle arrest
- walled carbon nanotubes
- tandem mass spectrometry
- human health
- energy transfer