Transport anisotropy and metal-insulator transition in striped Dirac fermion systems

Abstract

Using the determinant quantum Monte Carlo method, we investigate the metal-insulator transitions induced by the stripe of charge density in an interacting two-dimensional Dirac fermion system. The stripe will introduce the transport anisotropy and insulating intermediate phase into the system, accompanied by the change of band structure and a peak of density of states around Fermi energy. In the case of strong correlation, stripe exhibits competition with Coulomb repulsion through closing the energy gap and disrupting the magnetic order, and finally drives the system in Mott insulating phase back to the metallic state. Our results may provide a feasible way to modify transport properties by setting charge stripes in experiments.

8 pages, 9 figures

References in corpus (8)

• Anisotropic behaviors of massless Dirac fermions in graphene under periodic potential
• Absence of a Spin Liquid Phase in the Hubbard Model on the Honeycomb Lattice
• Quantum Monte Carlo Study of an Interaction-Driven Band Insulator to Metal Transition
• Dirac-Kronig-Penney model for strain-engineered graphene
• Stripes in the extended $t-t^{\prime }$ Hubbard model: A Variational Monte Carlo analysis
• Nearly flat Andreev bound states in superconductor-topological insulator hybrid structures
• Metal-insulator transition in the disordered Hubbard model of the Lieb lattice
• $\pi$-Phase shift across stripes in a charge density wave system

Cited by in corpus (2)

• Dual role of stripe phase on superconducting correlation in a bilayer square lattice
• Disorder Suppression of Charge Density Waves in the Honeycomb Holstein Model