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Temperature-Induced Plasmon Excitations for the α-T3 Lattice in Perpendicular Magnetic Field
Antonios Balassis1, Godfrey Gumbs2,3, Oleksiy Roslyak1
1Department of Physics & Engineering Physics, Fordham University, 441 East Fordham Road, Bronx, NY 10458, USA.
Nanomaterials (Basel, Switzerland)
|July 2, 2021
Summary
We studied the α-T3 model with a mass term and magnetic fields. This allowed comparison of its properties at low and high fields, focusing on magnetoplasmon dispersion.
Area of Science:
- Condensed matter physics
- Quantum mechanics
- Materials science
Background:
- The α-T3 model describes unique electronic properties in 2D materials.
- Understanding its behavior under external fields is crucial for novel electronic applications.
Purpose of the Study:
- Investigate the α-T3 model with a mass term and a magnetic field.
- Analyze the magnetoplasmon dispersion relation in different field regimes.
Main Methods:
- Introducing a gap-opening mass term to the α-T3 model.
- Applying a uniform perpendicular quantizing magnetic field.
- Calculating the dielectric function via system polarizability.
Main Results:
- The mass term mimics Zeeman splitting at low magnetic fields.
- Distinct magnetoplasmon dispersion relations were observed at low and high magnetic fields.
- Dielectric function depends on subband transition energies and wavefunction overlaps.
Conclusions:
- The study provides insights into the α-T3 model's response to magnetic fields and mass perturbations.
- Findings are relevant for designing materials with tunable electronic properties.
- The comparison between low and high field regimes offers a comprehensive understanding.
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