Electrically addressing the spin of a magnetic porphyrin through covalently connected graphene electrodes

Abstract

We report on the fabrication and transport characterization of atomically-precise single molecule devices consisting of a magnetic porphyrin covalently wired by graphene nanoribbon electrodes. The tip of a scanning tunneling microscope was utilized to contact the end of a GNR-porphyrin-GNR hybrid system and create a molecular bridge between tip and sample for transport measurements. Electrons tunneling through the suspended molecular heterostructure excited the spin multiplet of the magnetic porphyrin. The detachment of certain spin-centers from the surface shifted their spin-carrying orbitals away from an on-surface mixed-valence configuration, recovering its original spin state. The existence of spin-polarized resonances in the free-standing systems and their electrical addressability is the fundamental step for utilization of carbon-based materials as functional molecular spintronics systems.

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Cited by in corpus (13)

• Circumventing the Stability Problems of Graphene Nanoribbon Zigzag Edges
• Topologically localized excitons in single graphene nanoribbons
• Engineered electronic states in atomically precise artificial lattices and graphene nanoribbons
• Addressing electron spins embedded in metallic graphene nanoribbons
• Transferring Axial Molecular Chirality Through a Sequence of On-Surface Reactions
• Spin dependent transmission of Nickelocene-Cu contacts probed with shot noise
• Designing a mechanically driven spin-crossover molecular switch via organic embedding
• Vibron-assisted spin excitation in a magnetically anisotropic nickelocene complex
• Electron traversal times in disordered graphene nanoribbons
• Proposal for all-electrical spin manipulation and detection for a single molecule on boron-substituted graphene
• Tunable Current Rectification Through a Designer Graphene Nanoribbon
• Robust quantum engineering of current flow in carbon nanostructures at room temperature
• Independent and coherent transitions between antiferromagnetic states of few-molecule systems