Half-Metallic Silicene and Germanene Nanoribbons: towards High-Performance Spintronics Device

Abstract

By using first-principles calculations, we predict that an in-plane homogenous electrical field can induce half-metallicity in hydrogen-terminated zigzag silicene and germanene nanoribbons (ZSiNRs and ZGeNRs). A dual-gated finite ZSiNR device reveals a nearly perfect spin-filter efficiency of up to 99% while a quadruple-gated finite ZSiNR device serves as an effective spin field effect transistor (FET) with an on/off current ratio of over 100 from ab initio quantum transport simulation. This discovery opens up novel prospect of silicene and germanene in spintronics.

References in corpus (15)

• The SIESTA method for ab initio order-N materials simulation
• Efficient index handling of multidimensional periodic boundary conditions
• Density functional method for nonequilibrium electron transport
• Energy Gaps in Graphene Nanoribbons
• Half-Metallic Graphene Nanoribbons
• Two and one-dimensional honeycomb structures of silicon and germanium
• Electronic spin transport and spin precession in single graphene layers at room temperature
• Electronic structure of silicon-based nanostructures
• ab initio modeling of open systems: charge transfer, electron conduction, and molecular switching of a C_{60} device
• Electronic measurement and control of spin transport in Silicon
• Enhanced Half-Metallicity in Edge-Oxidized Zigzag Graphene Nanoribbons
• Giant magnetoresistance in ultra-small Graphene based devices
• Coherent spin transport through a 350-micron-thick Silicon wafer
• Local gating of a graphene Hall bar by graphene side gates
• Geometric dephasing-limited Hanle effect in long-distance lateral silicon spin transport devices

Cited by in corpus (18)

• From a normal insulator to a topological insulator in plumbene
• AC/DC Spin and Valley Hall Effects in Silicene and Germanene
• Is Silicene the Next Graphene?
• Spin- and valley-dependent transport through arrays of ferromagnetic silicene junctions
• Spin effects in thermoelectric properties of Al and P doped zigzag silicene nanoribbons
• Thermal transport in silicene nanotubes: Effects of length, grain boundary and strain
• Fully Spin-Polarized Current in Gated Bilayer Silicene
• Ultrafast field control of symmetry, reciprocity, and reversibility in buckled graphene-like materials
• Thermal conductance by Dirac fermions in a normal-insulator-superconductor junction of silicene
• Quantum charge pumping through resonant crossed Andreev reflection in superconducting hybrid junction of Silicene
• Tunnel-Field-Effect Spin Filter from Two-Dimensional Antiferromagnetic Stanene
• Electrically Induced Dirac Fermions in Graphene Nanoribbons
• Tunability of the Fractional Quantum Hall States in Buckled Dirac Materials
• Exploring Low Internal Reorganization Energies for Silicene Nanoclusters
• Enhancement of Rashba spin-orbit coupling by electron-electron interaction
• Photo-induced spin and valley-dependent Seebeck effect in the low-buckled Dirac materials
• Quantum Hall ferromagnets and transport properties of buckled Dirac materials
• Fundamental Properties of Metal-Adsorbed Silicene: A DFT Study