Controllable Spin-Charge Transport in Strained Graphene Nanoribbon Devices

Abstract

We theoretically investigate the spin-charge transport in two-terminal device of graphene nanoribbons in the presence of an uniform uniaxial strain, spin-orbit coupling, exchange field and smooth staggered potential. We show that the direction of applied strain can efficiently tune strain-strength induced oscillation of band-gap of armchair graphene nanoribbon (AGNR). It is also found that electronic conductance in both AGNR and zigzag graphene nanoribbons (ZGNRs) oscillates with Rashba spin-orbit coupling akin to the Datta-Das field effect transistor. Two distinct strain response regimes of electronic conductance as function of spin-orbit couplings (SOC) magnitude are found. In the regime of small strain, conductance of ZGNR presents stronger strain dependence along the longitudinal direction of strain. Whereas for high values of strain shows larger effect for the transversal direction. Furthermore, the local density of states (LDOS) shows that depending on the smoothness of the staggered potential, the edge state of AGNR can either emerge or be suppressed. These emerging states can be determined experimentally by performing spatially scanning tunneling microscope or by scanning tunneling spectroscopy. Our findings open up new paradigms of manipulation and control of strained graphene based nanostructure for application on novel topological quantum devices.

References in corpus (37)

• Topological Insulators
• Spintronics: Fundamentals and applications
• Quantum Spin Hall Effect in Graphene
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Berry Phase Effects on Electronic Properties
• Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
• Substrate-induced band gap opening in epitaxial graphene
• Uniaxial Strain in Graphene by Raman Spectroscopy: G peak splitting, Gruneisen Parameters and Sample Orientation
• Substrate-induced bandgap in graphene on hexagonal boron nitride
• A tight-binding approach to uniaxial strain in graphene
• STM Spectroscopy of ultra-flat graphene on hexagonal boron nitride
• Graphene field-effect-transistors with high on/off current ratio and large transport band gap at room temperature
• Spin-orbit coupling in curved graphene, fullerenes, nanotubes, and nanotube caps
• Quantum Anomalous Hall Effect in Graphene from Rashba and Exchange Effects
• High-Resolution Scanning Tunneling Microscopy Imaging of Mesoscopic Graphene Sheets on an Insulating Surface
• Rashba effect in the graphene/Ni(111) system
• Quantum Anomalous Hall Effect in Graphene Proximity Coupled to an Antiferromagnetic Insulator
• Time-reversal-symmetry-broken quantum spin Hall effect
• Quantum Anomalous Hall Effect in Single-layer and Bilayer Graphene
• Elastic and plastic deformation of graphene, silicene, and boron nitride honeycomb nanoribbons under uniaxial tension: A first-principles density-functional theory study
• Strain effect on the optical conductivity of graphene
• Symmetry Breaking in Few Layer Graphene Films
• Adatoms and clusters of 3d transition metals on graphene: Electronic and magnetic configurations
• Integration of the Ferromagnetic Insulator EuO onto Graphene
• Microscopic theory of quantum anomalous Hall effect in graphene
• Current-voltage (I-V) characteristics of armchair graphene nanoribbons under uniaxial strain
• Spin-resolved scattering through spin-orbit nanostructures in graphene
• Evolution of Landau Levels into Edge States at an Atomically Sharp Edge in Graphene
• Observation of Landau level-like quantizations at 77 K along a strained-induced graphene ridge
• Resonant radiation pressure on neutral particles in a waveguide
• A topological look at the quantum spin Hall state
• Combined effect of strain and defects on the conductance of graphene nanoribbons
• Strain effect on quantum conductance of graphene nanoribbons from maximally localized Wannier functions
• Scanning Tunneling Microscopy and Spectroscopy of Graphene on Insulating Substrates
• Conductance across strain junctions in graphene nanoribbons
• Intrinsic spin-orbit interactions in flat and curved graphene nanoribbons
• Engineering the Quantum Anomalous Hall Effect in Graphene with Uniaxial Strains

Cited by in corpus (4)

• Ab initio spin-flip conductance of hydrogenated graphene nanoribbons: Spin-orbit interaction and scattering with local impurity spins
• Braiding of edge states in narrow zigzag graphene nanoribbons: effect of the third neighbors hopping
• Graphene-based spin switch device via modulated Rashba field and strain
• New supercurrent pattern in quantum point contact with strained graphene nanoribbon