Phonon dispersion: Diatomic Lattice

By Carlos Rivera

Important!: Your browser must be configured to run Java.

This is a JAVA applet showing a phonon dispersion curve for a 1 dimensional chain composed of two types of atoms with masses M1 and M2. Feel free to change the parameters to see the effect. f is the strength of the interaction between neighbors and a is the lattice spacing.

Units:
  • M1,M2: mass of Carbon atom.
  • a: 1 Å
  • f: 10-2N/m.

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