arXiv
Open Access
2014
Comment on "Floquet Fractional Chern Insulators"
Luca D'Alessio
Abstrak
In a recent paper [Phys. Rev. Lett. 112 156801 (2014)], Grushin et al. studied a Fermi-Hubbard-model for spinful electrons on a honeycomb lattice coupled to an external polarized electric field. By computing the Floquet Hamiltonian perturbatively to order $ω^{-1}$ (where $ω$ is the frequency of the drive) they predicted that, for specific values of the driving and filling, the system can transition into a Fractional Chern Insulator. In this comment we point out that: i) the calculation of the Floquet Hamiltonian misses some terms of order $ω^{-1}$ and ii) the assumption that the Floquet bands are filled as in time-independent systems is questionable.
Topik & Kata Kunci
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Luca D'Alessio
Akses Cepat
Informasi Jurnal
- Tahun Terbit
- 2014
- Bahasa
- en
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- arXiv
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- Open Access ✓