Quantum criticality of magnetic catalysis in two-dimensional correlated Dirac fermions

Abstract

We study quantum criticality of the magnetic field induced charge density wave (CDW) order in correlated spinless Dirac fermions on the $\pi$-flux square lattice at zero temperature as a prototypical example of the magnetic catalysis, by using the infinite density matrix renormalization group. It is found that the CDW order parameter $M(B)$ exhibits an anomalous magnetic field $(B)$ scaling behavior characteristic of the $(2+1)$-dimensional chiral Ising universality class near the quantum critical point, which leads to a strong enhancement of $M(B)$ compared with a mean field result. We also establish a global phase diagram in the interaction-magnetic field plane for the fermionic quantum criticality.

8 pages, to be published in Phys. Rev. Research

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Cited by in corpus (3)

• Dirac Kondo effect under magnetic catalysis
• Spin nematic order and superconductivity in $J_1$-$J_2$ Kondo lattice model on square lattice
• Anomalous enhancement of Neel order in the $S=1/2$ square lattice Heisenberg model under fictitious magnetic field