Smearing of the 2D Kohn anomaly in a nonquantizing magnetic field: Implications for the interaction effects
arXiv:cond-mat/0611111 · doi:10.1103/PhysRevLett.99.036401
Abstract
Thermodynamic and transport characteristics of a clean two-dimensional interacting electron gas are shown to be sensitive to the weak perpendicular magnetic field even at temperatures much higher than the cyclotron energy, when the quantum oscillations are completely washed out. We demonstrate this sensitivity for two interaction-related characteristics: electron lifetime and the tunnel density of states. The origin of the sensitivity is traced to the field-induced smearing of the Kohn anomaly; this smearing is the result of curving of the semiclassical electron trajectories in magnetic field.
arXiv comment4.5 pages, 3 figures, published version
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- Magneto-oscillations due to electron-electron interactions in the ac conductivity of a 2D electron gas
- Theory of Friedel oscillations in monolayer graphene and group-VI dichalcogenides in a magnetic field
- Thermal smearing of the magneto-Kohn anomaly for Dirac materials and comparison with the two-dimensional electron liquid
- Interaction effects in 2D electron gas in a random magnetic field: Implications for composite fermions and quantum critical point
- Persistent Friedel oscillations in Graphene due to a weak magnetic field
- Ballistic magnetotransport in graphene
- Interaction effects in graphene in a weak magnetic field
- Non-analytic magnetic field dependence of quasi-particle properties of two-dimensional metals
- Quantization and quantum oscillations of the sublattice charge order in Dirac insulators