Quantum Hall effective action for anisotropic Dirac semi-metal
arXiv:2006.14595 · doi:10.1103/PhysRevB.102.081303
Abstract
We present a study of Hall transport in semi-Dirac critical phases. The construction is based on a covariant formulation of relativistic systems with spatial anisotropy. Geometric data together with external electromagnetic fields is used to devise an expansion procedure that leads to a low-energy effective action consistent with the discrete symmetry that we impose. We use the action to discuss terms contributing to the Hall transport and extract the coefficients. We also discuss the associated scaling symmetry.
arXiv comment6 pages + supplementary material, 1 figure
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