Quantum oscillations in the zeroth Landau Level and the serpentine Landau fan
arXiv:2101.05294 · doi:10.1103/PhysRevLett.127.116602
Abstract
We identify an unusual mechanism for quantum oscillations in nodal semimetals, driven by a single pair of Landau levels periodically closing their gap at the Fermi energy as a magnetic field is varied. These `zero Landau level' quantum oscillations (ZQOs) appear in the nodal limit where the zero-field Fermi volume vanishes, and have distinctive periodicity and temperature dependence. We link the Landau spectrum of a two-dimensional (2D) nodal semimetal to the Rabi model, and show by exact solution that across the entire Landau fan, pairs of opposite-parity Landau levels are intertwined in a `serpentine' manner. We propose 2D surfaces of topological crystalline insulators as natural settings for ZQOs, and comment on implications for anomaly physics in 3D nodal semimetals.
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- Low-temperature theory of inversion and quantum oscillations in Kondo insulators
- Theoretical investigation of quantum oscillations of specific heat in Kondo insulators
- Breakdown of chiral anomaly and emergent phases in Weyl semimetals under orbital magnetic fields
- Anomalous Landau levels and quantum oscillation in rotation-invariant insulators