Vibrational modes of a two dimentional superlattice structure
A simple crystal structure with small unit cells has vibrational modes that must be understood from the motion of the individual atoms in the unit cell. Superlattice structures have a large number of atoms per unit cell and modes of vibration are possible which involve collective motion of the atoms. This collective motion can be described using renormalized models which do no require a detailed knowledge of the microscopic interactions of the systems. Vibrational modes associated with the collective motion of the atoms are known as phasons.
KeywordsDomain Wall Vibrational Mode Triangular Lattice Collective Motion Graphite Substrate
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