Giant spin orbit interaction due to rotating magnetic fields in graphene nanoribbons

Abstract

We theoretically study graphene nanoribbons in the presence of spatially varying magnetic fields produced e.g. by nanomagnets. We show both analytically and numerically that an exceptionally large Rashba spin orbit interaction (SOI) of the order of 10 meV can be produced by the non-uniform magnetic field. As a consequence, helical modes exist in armchair nanoribbons that exhibit nearly perfect spin polarization and are robust against boundary defects. This paves the way to realizing spin filter devices in graphene nanoribbons in the temperature regime of a few Kelvins. If a nanoribbon in the helical regime is in proximity contact to an s-wave superconductor, the nanoribbon can be tuned into a topological phase sustaining Majorana fermions.

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• Quantum Spin Hall Effect in Graphene
• Energy Band Gap Engineering of Graphene Nanoribbons
• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• New directions in the pursuit of Majorana fermions in solid state systems
• Evidence of Majorana fermions in an Al - InAs nanowire topological superconductor
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• Fermion Fractionalization to Majorana Fermions in Dimerized Kitaev Superconductor
• Kramers Pairs of Majorana Fermions and Parafermions in Fractional Topological Insulators
• Majorana nanowires for topological quantum computation
• Parafermions in Interacting Nanowire Bundle
• Floquet Majorana and Para-Fermions in Driven Rashba Nanowires
• Cubic spin-orbit coupling and anomalous Josephson effect in planar junctions
• Correlations between Majorana fermions through a superconductor
• Fermionic and Majorana Bound States in Hybrid Nanowires with Non-Uniform Spin-Orbit Interaction
• Proximity coupling in superconductor-graphene heterostructures
• Majorana Fermions in Ge/Si Hole Nanowires
• Wireless Majorana Bound States: From Magnetic Tunability to Braiding
• Majorana edge modes in the Kitaev model
• Quantum Spin Hall Effect in Strip of Stripes Model
• Fractional Charge and Spin States in Topological Insulator Constrictions
• Majorana bound states in open quasi-1D and 2D systems with transverse Rashba coupling
• Fractional Fermions with Non-Abelian Statistics
• Majorana bound states in semiconducting nanostructures
• Topological Phase Detection in Rashba Nanowires with a Quantum Dot
• Tuning Topological Superconductivity in Phase-Controlled Josephson Junctions with Rashba and Dresselhaus Spin-Orbit Coupling
• Integer and Fractional Quantum Anomalous Hall Effect in a Strip of Stripes Model
• Flat Majorana bands in 2-d lattices with inhomogeneous magnetic fields: topology and stability
• Topological Edge States and Fractional Quantum Hall Effect from Umklapp Scattering
• Transport signature of fractional Fermions in Rashba nanowires
• Tomography of Majorana Fermions with STM Tips
• Majorana and parafermion corner states from two coupled sheets of bilayer graphene
• Majorana modes in emergent-wire phases of helical and cycloidal magnet-superconductor hybrids
• Suppression of the overlap between Majorana fermions by orbital magnetic effects in semiconducting-superconducting nanowires
• Local Spin Susceptibilities of Low-Dimensional Electron Systems
• Effective Interactions in a Graphene Layer Induced by the Proximity to a Ferromagnet
• Majorana Bound States Induced by Antiferromagnetic Skyrmion Textures
• Quantum Computing with Majorana Kramers Pairs
• Spin-valley system in a gated MoS${}_2$-monolayer quantum dot
• Aspects of topological superconductivity in 2D systems: noncollinear magnetism, skyrmions, and higher-order topology
• Topological Superconductivity Induced by Magnetic Texture Crystals
• Control of Andreev bound states using superconducting phase texture
• Proximity effect in a two-dimensional electron gas coupled to a thin superconducting layer
• Planar Josephson junctions in germanium: Effect of cubic spin-orbit interaction
• Low-energy properties of fractional helical Luttinger liquids
• Josephson transistor from the superconducting diode effect in domain wall and skyrmion magnetic racetracks
• Renormalization of anticrossings in interacting quantum wires with Rashba and Dresselhaus spin-orbit couplings
• Prevalence of trivial zero-energy sub-gap states in non-uniform helical spin chains on the surface of superconductors
• Majorana bound states in a superconducting Rashba nanowire in the presence of antiferromagnetic order
• Levitons in helical liquids with Rashba spin-orbit coupling probed by a superconducting contact
• Formation of Majorana fermions in finite-size graphene strips
• Integrating micromagnets and hybrid nanowires for topological quantum computing
• Metallization and proximity superconductivity in topological insulator nanowires
• Superconducting diodes from magnetization gradients
• Majoranas with and without a 'character': hybridization, braiding and Majorana number
• Electronic structure of graphene-nanoribbons on hexagonal boron nitride
• Microwave detection of gliding Majorana zero modes in nanowires
• Vortex pinning by the point potential in topological superconductors: a scheme for braiding Majorana bound states
• Trapping Majorana Zero Modes in Vortices of Magnetic Texture Crystals Coupled to Nodal Superconductors
• Strain manipulation of Majorana fermions in graphene armchair nanoribbons
• Anatomy of Spin and Current Generation from Magnetization Gradients in Topological Insulators and Rashba Metals
• Mechanisms for Magnetic Skyrmion Catalysis and Topological Superconductivity
• Topological spin-singlet superconductors with underlying sublattice structure
• Topological superconductivity in a magnetic-texture coupled Josephson junction
• Universal conductance dips and fractional excitations in a two-subband quantum wire
• Platform for controllable Majorana zero modes using superconductor/ferromagnet heterostructures
• Effect of hybridization symmetry on topological phases of odd-parity multiband superconductors
• Instability of Majorana states in Shiba chains due to leakage into a topological substrate
• Finger-gate manipulated quantum transport in Dirac materials
• Majorana Braiding Racetracks from Charge Chern Insulator - Superconductor Hybrids
• Fractional chiral second-order topological insulator from a three-dimensional array of coupled wires
• Majorana bound states with chiral magnetic textures
• Electronic correlations in magnetized helical edge states coupled to s-wave superconductors
• Distinguishing Majorana bound states from accidental zero-energy modes with a microwave cavity
• Chiral Majorana Fermions in two dimensional square lattice antiferromagnet with proximity-induced superconductivity