Question

Clearly explain the differences between the Drude and Drude-Sommerfeld models.

Clearly explain the differences between the Drude and Drude-Sommerfeld models.

Homework Answers

Answer #1

Drude Model -

  • The Drude model was the first attempt to use the idea of a 'gas' of electrons, free to move between positively charged ionic cores
  • Some assumptions were that electron collisions were instantaneous and results in change in velocity and achieve thermal equilibrium only through these collisions.
  • electrons were treated as free particles moving in a constant potential.
  • Applied maxwell boltzmann statistics
  • Electrons were identical and distinguishable

Drude - Sommerfield model -

  • It was same as drude model with few modifications like it treats electrons with Fermi - Dirac statistics
  • It treats electrons like particle in a box with constant energy.
  • It makes use of pauli principle in order to distribute electrons as per available energy states.
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