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Published on: November 21, 2019
Magnetoplasmons for theα-T3model with filled Landau levels
Antonios Balassis1, Dipendra Dahal2, Godfrey Gumbs2,3
1Department of Physics and Engineering Physics, Fordham University, 441 East Fordham Road, Bronx, NY 10458, United States of America.
We studied polarization functions and magnetoplasmon dispersion in a honeycomb lattice model with a magnetic field. A critical behavior in polarization functions leads to magnetoplasmon mode softening.
Area of Science:
- Condensed matter physics
- Materials science
Background:
- The α-T3 model describes electronic properties in honeycomb lattices.
- Perpendicular magnetic fields induce Landau levels, affecting material properties.
Purpose of the Study:
- To investigate static and dynamic polarization functions.
- To analyze magnetoplasmon dispersion relations in a magnetic field.
Main Methods:
- Analytical and numerical calculations using the α-T3 model.
- Random Phase Approximation (RPA) was employed.
Main Results:
- Magnetic fields create discrete, valley-dependent Landau levels.
- Landau levels significantly impact polarization functions and magnetoplasmon dispersion.
- A critical behavior in polarization functions causes magnetoplasmon mode softening.
Conclusions:
- The study reveals key effects of magnetic fields and hopping parameters on electronic properties.
- Understanding these phenomena is crucial for designing novel electronic devices.
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