Ferrimagnetic and antiferromagnetic phase in bilayer graphene nanoflake controlled with external electric fields
arXiv:1701.09128 · doi:10.1016/j.carbon.2017.03.019
Abstract
The paper presents a computational study of the ground-state magnetic phases of a selected bilayer graphene nanoflake in external electric field and magnetic field. The electric field has parallel and perpendicular component while the magnetic field is oriented in plane. The system consists of two rectangular layers having armchair edges and zigzag terminations with Bernal stacking. The theoretical model is based on a tight binding Hamiltonian with Hubbard term. The magnetic phase diagram involving the total spin is constructed, showing the stability areas of phases with total spin values equal to 0 and 1. A significant stability range of antiferromagnetic, layer-like arrangements is found and extensively discussed. The possibility of switching between nonmagnetic, antiferromagnetic and ferrimagnetic phases with both components of external electric field is demonstrated, being a manifestation of a magnetoelectric effect. The influence of magnetic field on the phase diagrams is analysed.
References in corpus (18)
- Electric Field Effect in Atomically Thin Carbon Films
- Graphene Spintronics
- Emergence of magnetism in graphene materials and nanostructures
- The electronic properties of bilayer graphene
- Room temperature magnetic order on zigzag edges of narrow graphene nanoribbons
- Ab Initio Theory of Gate Induced Gaps in Graphene Bilayers
- Determination of the electronic structure of bilayer graphene from infrared spectroscopy results
- Integration of the Ferromagnetic Insulator EuO onto Graphene
- Energy gaps, magnetism, and electric field effects in bilayer graphene nanoribbons
- Tailoring magnetic insulator proximity effects in graphene: First-principles calculations
- Graphene nanoflakes in external electric and magnetic in-plane fields
- Manipulation of edge magnetism in hexagonal graphene nanoflake
- Antiferromagnetism in hexagonal graphene structures: Rings vs dots
- Modulation of bandgap in bilayer armchair graphene ribbons by tuning vertical and transverse electric fields
- Magnetoelectric effect in bilayer graphene controlled by valley-isospin density
- Noncollinear magnetism and half-metallicity in biased bilayer zigzag graphene nanoribbons
- Giant Magnetoresistance in Bilayer Graphene Nanoflakes
- Electric field control of spins in bilayer graphene: Local moment formation and local moment interactions
Cited by in corpus (5)
- Antiferromagnetic ordering and excitonic pairing in the AA-stacked bilayer graphene
- Landau quantization in buckled monolayer GaAs
- Excitonic condensation and metal-semiconductor transition in AA bilayer graphene in the external magnetic field
- Electrically-induced polarization selection rules of a graphene quantum dot
- Anomalous Bloch oscillation and electrical switching of edge magnetization in bilayer graphene nanoribbon