Lattice Vibrations and Heat Capacity
Einstein’s and Debye’s theories of the heat capacity of a solid are presented. The quantum particles (phonons) for the lattice vibrations are introduced.
Let us consider a crystal lattice at low temperatures. We may expect each atom forming the lattice to execute small oscillations around the equilibrium position. For illustration let us consider the one-dimensional lattice shown in Figure 2.1.
KeywordsHeat Capacity Normal Mode Debye Temperature Lattice Vibration Lagrangian Density
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