Metal-Insulator Transition of Dirac Fermions: Variational Cluster Study
arXiv:1502.04435 · doi:10.7566/JPSJ.84.044714
Abstract
A comparative study is made on the metal-insulator transition of Dirac fermions in the honeycomb and π-flux Hubbard models at half filling by means of the variational cluster approximation and cluster dynamical impurity approximation. Paying particular attention to the choice of the geometry of solver clusters and the inclusion of particle-bath sites, we show that the direct transition from the Dirac semimetallic state to the antiferromagnetic Mott insulator state occurs in these models, and therefore, the spin liquid phase is absent in the intermediate region, in agreement with recent quantum-Monte-Carlo--based calculations.
6 pages, 6 figures
References in corpus (13)
- The electronic properties of graphene
- Quantum spin-liquid emerging in two-dimensional correlated Dirac fermions
- Interactions and phase transitions on graphene's honeycomb lattice
- Variational cluster approach to correlated electron systems in low dimensions
- Absence of a Spin Liquid Phase in the Hubbard Model on the Honeycomb Lattice
- Mott Physics and Topological Phase Transition in Correlated Dirac Fermions
- Self-energy-functional approach: Analytical results and the Mott-Hubbard transition
- Variational cluster approach to spontaneous symmetry breaking: The itinerant antiferromagnet in two dimensions
- Interacting Dirac Fermions on Honeycomb Lattice
- First order Mott transition at zero temperature in two dimensions: Variational plaquette study
- Dynamical Mean Field Study of The Dirac Liquid
- Finite temperature semimetal-insulator transition on the honeycomb lattice
- Mott physics in the half-filled Hubbard model on a family of vortex-full square lattices