Proximity magnetoresistance in graphene induced by magnetic insulators
arXiv:1906.04469 · doi:10.1103/PhysRevB.100.104402
Abstract
We demonstrate the existence of Giant proximity magnetoresistance (PMR) effect in a graphene spin valve where spin polarization is induced by a nearby magnetic insulator. PMR calculations were performed for yttrium iron garnet (YIG), cobalt ferrite (CFO), and two europium chalcogenides EuO and EuS. We find a significant PMR (up to 100%) values defined as a relative change of graphene conductance with respect to parallel and antiparallel alignment of two proximity induced magnetic regions within graphene. Namely, for high Curie temperature (Tc) CFO and YIG insulators which are particularly important for applications, we obtain 22% and 77% at room temperature, respectively. For low Tc chalcogenides, EuO and EuS, the PMR is 100% in both cases. Furthermore, the PMR is robust with respect to system dimensions and edge type termination. Our findings show that it is possible to induce spin polarized currents in graphene with no direct injection through magnetic materials.
6 pages, 5 figures
References in corpus (41)
- The electronic properties of graphene
- Two-Dimensional Gas of Massless Dirac Fermions in Graphene
- Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
- Half-Metallic Graphene Nanoribbons
- Electronic spin transport and spin precession in single graphene layers at room temperature
- Magnetism in Graphene Induced by Single-Atom Defects
- Kwant: a software package for quantum transport
- Spin qubits in graphene quantum dots
- Proximity-induced ferromagnetism in graphene revealed by anomalous Hall effect
- Spin-Orbit Proximity Effect in Graphene
- Spin transport in proximity induced ferromagnetic graphene
- Highly efficient spin transport in epitaxial graphene on SiC
- Quantum Anomalous Hall Effect in Graphene Proximity Coupled to an Antiferromagnetic Insulator
- Strong interface-induced spin-orbit coupling in graphene on WS2
- Spin Relaxation in Single Layer and Bilayer Graphene
- Strong interfacial exchange field in the graphene/EuS heterostructure
- Magnetic Insulator-Induced Proximity Effects in Graphene: Spin Filtering and Exchange Splitting Gaps
- Spin currents in rough graphene nanoribbons: Universal fluctuations and spin injection
- Trivial and inverted Dirac bands, and emergence of quantum spin Hall states in graphene on transition-metal dichalcogenides
- Spin lifetimes exceeding 12 nanoseconds in graphene non-local spin valve devices
- Observation of Long Spin Relaxation Times in Bilayer Graphene at Room Temperature
- Quantum Anomalous Hall Effect in Single-layer and Bilayer Graphene
- A Guide to the Design of Electronic Properties of Graphene Nanoribbons
- Electronic spin transport in graphene field effect transistors
- Large Proximity-Induced Spin Lifetime Anisotropy in Transition Metal Dichalcogenide/Graphene Heterostructures
- Proximity induced room-temperature ferromagnetism in graphene probed with spin currents
- Tailoring magnetic insulator proximity effects in graphene: First-principles calculations
- Theory of huge tunneling magnetoresistance in graphene
- Long spin relaxation times in wafer scale epitaxial graphene on SiC(0001)
- Proximity effect in graphene-topological insulator heterostructures
- Theory of proximity-induced exchange coupling in graphene on hBN/(Co, Ni)
- Proximity-induced giant spin-orbit interaction in epitaxial graphene on topological insulator
- Spin Dynamics and Relaxation in Graphene Dictated by Electron-hole Puddles
- Interface induced room-temperature ferromagnetism in hydrogenated epitaxial graphene
- Inducing and Optimizing Magnetism in Graphene Nanomesh
- Effects of Dephasing on Spin Lifetime in Ballistic Spin-Orbit Materials
- Coherent transport through graphene nanoribbons in the presence of edge disorder
- Spin filter and spin valve in ferromagnetic graphene
- Spin-selectable, region-tunable negative differential resistance in graphene double ferromagnetic barriers
- Electric-field-induced extremely large change in resistance in graphene ferromagnets
- Spin-orbit proximity effect in graphene on metallic substrates: decoration vs intercalation with metal adatoms