Strain induced edge magnetism at zigzag edge in graphene quantum dot

Abstract

We study the temperature dependent magnetic susceptibility of a strained graphene quantum dot by using the determinant quantum Monte Carlo method. Within the Hubbard model on a honeycomb lattice, our unbiased numerical results show that a relative small interaction $U$ may lead to a edge ferromagnetic like behavior in the strained graphene quantum dot, and a possible room temperature transition is suggested. Around half filling, the ferromagnetic fluctuations at the zigzag edge is strengthened both markedly by the on-site Coulomb interaction and the strain, especially in low temperature region. The resultant strongly enhanced ferromagnetic like behavior may be important for the development of many applications.

4 Pages, and 6 figures. More discussions are added and accepted for publication as a Regular Article in Physical Review B

References in corpus (20)

• Electric Field Effect in Atomically Thin Carbon Films
• The electronic properties of graphene
• Detection of Individual Gas Molecules Absorbed on Graphene
• A tight-binding approach to uniaxial strain in graphene
• Emergence of magnetism in graphene materials and nanostructures
• Colloquium: The transport properties of graphene: An introduction
• Magnetism in graphene nano-islands
• Magnetic Correlations at Graphene Edges
• Structure, Stability, Edge States and Aromaticity of Graphene Ribbons
• Interactions and phase transitions on graphene's honeycomb lattice
• Magnetism in Disordered Graphene and Irradiated Graphite
• Limits on intrinsic magnetism in graphene
• Strained graphene: tight-binding and density functional calculations
• Symmetry Classes in Graphene Quantum Dots: Universal Spectral Statistics, Weak Localization, and Conductance Fluctuations
• Dynamical Signatures of Edge-State Magnetism on Graphene Nanoribbons
• Edge-dependent selection rules in magic triangular graphene flakes
• Edge State Magnetism of Single Layer Graphene Nanostructures
• Effect of Uniaxial Strain on Ferromagnetic Instability and Formation of Localized Magnetic States on Adatoms in Graphene
• Strain induced correlation gaps in carbon nanotubes
• Electronic Bloch oscillation in bilayer graphene gradient superlattices

Cited by in corpus (3)

• Graphene nanoflakes in external electric and magnetic in-plane fields
• Strain-induced effects in the electronic and spin properties of a monolayer of ferromagnetic GdAg2
• Anisotropy engineering edge magnetism in zigzag honeycomb nanoribbons