Polarization modes of lattice waves in two-dimensional honeycomb lattices

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  • School of Physics and Astronomy, SunYat-Sen University, Zhuhai, Guangdong 519082, China

Received date: 2024-12-31

  Revised date: 2025-02-05

  Online published: 2026-01-19

Abstract

This work analyzed polarization modes of lattice waves at various wave vectors in two-dimensional honeycomb lattices, which can provide new insights for teaching lattice vibrations in Solid State Physics. The dynamical matrix of the lattice vibration and its eigenvalue equation can be obtained through analyzing the lattice motion, from which the phonon dispersion and polarization can be solved. Symmetry analysis indicates that the vibration modes at high-symmetry wave vectors M and K have linear and circular polarizations, respectively. A perturbation theory from Quantum Mechanics can be used to solve lattice waves at wave vectors near K, which are found to exhibit elliptical polarizations. 

Cite this article

PENG Shengyu, QIAN Yewu, YU Hongyi . Polarization modes of lattice waves in two-dimensional honeycomb lattices[J]. College Physics, 2025 , 44(11) : 20 . DOI: 10.16854/j.cnki.1000-0712.240615

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