Influence of impurity spin dynamics on quantum transport in epitaxial graphene

Abstract

Experimental evidence from both spin-valve and quantum transport measurements points towards unexpectedly fast spin relaxation in graphene. We report magnetotransport studies of epitaxial graphene on SiC in a vector magnetic field showing that spin relaxation, detected using weak-localisation analysis, is suppressed by an in-plane magnetic field, $B_{\parallel }$, and thereby proving that it is caused at least in part by spinful scatterers. A non-monotonic dependence of effective decoherence rate on $B_{\parallel }$ reveals the intricate role of scatterers' spin dynamics in forming the interference correction to conductivity, an effect that has gone unnoticed in earlier weak localisation studies

References in corpus (10)

• Graphene Spintronics
• Weak localisation magnetoresistance and valley symmetry in graphene
• Weak localisation in graphene flakes
• Charge transfer between epitaxial graphene and silicon carbide
• Encapsulation and Electronic Control of Epitaxial Graphene by Photosensitive Polymers and UV light
• Long spin relaxation times in wafer scale epitaxial graphene on SiC(0001)
• The interface structure of epitaxial graphene grown on 4H-SiC(0001)
• Defect-mediated spin relaxation and dephasing in graphene
• Localized states influence spin transport in epitaxial graphene
• Suppression of decoherence in a graphene monolayer ring

Cited by in corpus (10)

• Spin Manipulation in Graphene by Chemically-Induced Sublattice Pseudospin Polarization
• Scaling behavior of spin transport in hydrogenated graphene
• Microscopic linear response theory of spin relaxation and relativistic transport phenomena in graphene
• Out-of-plane corrugations in graphene based van der Waals heterostructures
• Ambipolar charge transport in quasi-free-standing monolayer graphene on SiC obtained by gold intercalation
• Spin relaxation in disordered graphene: Interplay between puddles and defect-induced magnetism
• Weak localization measurements of electronic scattering rates in Li-doped epitaxial graphene
• Influence of spin dynamics of defects on weak localization in paramagnetic 2D metals
• Asymmetric Electron-Hole Decoherence in Ion-Gated Epitaxial Graphene
• Stability of Majorana bound states in the presence of spin-flip scattering