Zigzag nanoribbon of gated bilayer hexagonal crystals with spontaneous edge magnetism
arXiv:2108.00763 · doi:10.1103/PhysRevB.104.235438
Abstract
Zigzag nanoribbons of monolayer graphene-like two-dimensional materials host spontaneous edge magnetism at the zigzag terminations, whose configuration controls the band gap. In this article, the edge magnetism of zigzag nanoribbons of bilayer hexagonal crystals are studied. The specific models of bilayer graphene and bilayer silicene are both studied. As the gated voltage increases, the total energy level, magnetic structure and band structures of the ground state and the first quasi-stable excited state are tuned. For certain region of the gated voltage, the band gaps of spin up and down are opened and closed, respectively, so that the systems are in the spin-polarized metallic phase. The spin-polarized conducting edge band of the bilayer nanoribbons could be applied for gate tunable spintronic devices.
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References in corpus (27)
- The electronic properties of graphene
- Energy Gaps in Graphene Nanoribbons
- Half-Metallic Graphene Nanoribbons
- Graphene Spintronics
- Emergence of magnetism in graphene materials and nanostructures
- Valley-Polarized Metals and Quantum Anomalous Hall Effect in Silicene
- Quantum Anomalous Hall Effect in Graphene from Rashba and Exchange Effects
- Quantum Anomalous Hall Effect in Graphene Proximity Coupled to an Antiferromagnetic Insulator
- Spin-Valleytronics in Silicene: Quantum-Spin-Quantum-Anomalous Hall Insulators and Single-Valley Semimetals
- Competition between spin and charge polarized states in nanographene ribbons with zigzag edges
- Optimal charge-to-spin conversion in graphene on transition metal dichalcogenides
- Quantum Anomalous Hall Effects in Graphene from Proximity-Induced Uniform and Staggered Spin-Orbit and Exchange Coupling
- Dynamical Signatures of Edge-State Magnetism on Graphene Nanoribbons
- Hidden multiferroic order in graphene zigzag ribbons
- Theory of proximity-induced exchange coupling in graphene on hBN/(Co, Ni)
- Interactions and magnetism in graphene boundary states
- Topological phases in gated bilayer graphene: Effects of Rashba spin-orbit coupling and exchange field
- Edge magnetization and local density of states in chiral nanoribbons
- Spin waves in zigzag graphene nanoribbons and the stability of edge ferromagnetism
- Structural stability and energy-gap modulation through atomic protrusion in freestanding bilayer silicene
- Edge magnetism impact on electrical conductance and thermoelectric properties of graphenelike nanoribbons
- Non-local exchange effects in zigzag edge magnetism of neutral graphene nanoribbons
- Exact diagonalization study of the tunable edge magnetism in graphene
- Valley- and spin-dependent quantum Hall states in bilayer silicene
- Topological edge states of a graphene zigzag nanoribbon with spontaneous edge magnetism
- Selected graphenelike zigzag nanoribbons with chemically functionalized edges: Implications for electronic and magnetic properties
- Bosonic field theory of tunable edge magnetism in graphene