Abstract
We consider the Hall conductivity of composite fermions in the theory of Halperin, Lee, and Read (HLR) [B. I. Halperin, P. A. Lee, and N. Read, Phys. Rev. B 47, 7312 (1993)]. We present a fully quantum-mechanical numerical calculation that shows, under suitable conditions, the HLR theory exhibits a particle-hole symmetric dc electrical Hall response in the presence of quenched disorder. Remarkably, this response of the HLR theory remains robust even when the disorder range is of the order of the Fermi wavelength. We find that deviations from the particle-hole symmetric response can appear in the ac Hall conductivity at frequencies sufficiently large compared to the inverse system size. Our results agree with a recent semiclassical analysis by Wang et al. [C. Wang, N. R. Cooper, B. I. Halperin, and A. Stern, Phys. Rev. X 7, 031029 (2017)] and complement the arguments based on the fully quantum-mechanical model by Kumar et al. [P. Kumar, M. Mulligan, and S. Raghu, Phys. Rev. B 98, 115105 (2018)]. These results provide further evidence that the HLR theory is compatible with an emergent particle-hole symmetry.
- Received 25 October 2018
- Revised 19 May 2019
DOI:https://doi.org/10.1103/PhysRevB.99.235114
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