Free Electron Model

• the independent electron approximation that considers the electrons as independent. Electron screening is one justification for ignoring electron-electron interactions.
• the electrons move in a constant energy potential (the structure of the material is completely ignored). The Bloch theorem states that a periodic potential (such as a regular array of atoms) cannot scatter a travelling wave electron.

Predictions of the model

• the shape of the electronic density of states.
• the range of binding energy values.
• the heat capacity functional form.
• electrical conductivities.
• the Weidemann-Franz law.

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