Instability of Dirac semimetal phase under strong magnetic field

Abstract

The quantum limit can be easily reached in the Dirac semimetals under the magnetic field, which will lead to some exotic many-body physics due to the high degeneracy of the topological zeroth Landau bands (LBs). By solving the effective Hamiltonian, which is derived by tracing out the high energy degrees of freedom, at the self-consistent mean field level, we have systematically studied the instability of Dirac semimetal under a strong magnetic field. A charge density wave (CDW) phase and a polarized nematic phase formed by "exciton condensation" are predicted as the ground state for the tilted and untilted bands, respectively. Furthermore, we propose that, distinguished from the CDW phase, the polarized nematic phase can be identified in experiments by anisotropic transport and Raman scattering.

References in corpus (10)

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Cited by in corpus (8)

• Theory for the Charge-Density-Wave Mechanism of 3D Quantum Hall Effect
• Electron Transport in Dirac and Weyl Semimetals
• Propagation of longitudinal acoustic phonons in ZrTe${}_5$ exposed to a quantizing magnetic field
• Ground-state atlas of a three-dimensional semimetal in the quantum limit
• Simulating Higher-Order Topological Insulators in Density Wave Insulators
• Dirac Kondo effect under magnetic catalysis
• Theory of phonon instabilities in Weyl semimetals at high magnetic fields
• Magnetic-field-induced electronic instability of Weyl-like fermions in compressed black phosphorus