Effect of in-situ deposition of Mg adatoms on spin relaxation in graphene

Abstract

We have systematically introduced charged impurity scatterers in the form of Mg adsorbates to exfoliated single layer graphene and observe little variation of the spin relaxation times despite pronounced changes in the charge transport behavior. All measurements are performed on non-local graphene tunneling spin valves exposed in-situ to Mg adatoms, thus systematically introducing atomic-scale charged impurity scattering. While charge transport properties exhibit decreased mobility and decreased momentum scattering times, the observed spin lifetimes are not significantly affected indicating that charged impurity scattering is inconsequential in the present regime of spin relaxation times.

arXiv commentAccepted to Phys. Rev. B

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• Resonant scattering due to adatoms in graphene: top, bridge, and hollow position
• Contact-induced charge contributions to non-local spin transport measurements in Co/MgO/graphene devices
• Measuring anisotropic spin relaxation in graphene
• Electrical control of intervalley scattering in graphene via the charge state of defects
• Volkov-Pankratov states in topological graphene nanoribbons
• Integrating MBE materials with graphene to induce novel spin-based phenomena
• Spin and charge transport in graphene-based spin transport devices with Co/MgO spin injection and spin detection electrodes
• Impurity resonance effects in graphene $vs$ impurity location, concentration and sublattice occupation
• Spin dependent quantum interference in non-local graphene spin valves
• Spin Relaxation in Graphene with self-assembled Cobalt Porphyrin Molecules
• Scattering from spin-polarized charged impurities in graphene