Universal magnetic oscillations of DC conductivity in the incoherent regime of correlated systems
arXiv:2104.14588 · doi:10.1103/PhysRevLett.127.196601
Abstract
Using the dynamical mean field theory we investigate the magnetic field dependence of DC conductivity in the Hubbard model on the square lattice, fully taking into account the orbital effects of the field introduced via the Peierls substitution. In addition to the conventional Shubnikov-de Haas quantum oscillations, associated with the coherent cyclotron motion of quasiparticles and the presence of a well-defined Fermi surface, we find an additional oscillatory component with a higher frequency that corresponds to the total area of the Brillouin zone. These paradigm-breaking oscillations appear at elevated temperature. This finding is in excellent qualitative agreement with the recent experiments on graphene superlattices. We elucidate the key roles of the off-diagonal elements of the current vertex and the incoherence of electronic states, and explain the trends with respect to temperature and doping.
6 pages, 3 figures
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- Orbital Magnetic Field Driven Metal-Insulator Transition in Strongly Correlated Electron Systems
- Improved estimator for numerical renormalization group calculations of the self-energy
- Magnetoresistivity in the Antiferromagnetic Hubbard Model
- Hall Coefficient and Resistivity in the Doped Bilayer Hubbard Model