Chapter 19.2

Chapter 19.2 - Heat capacity of metals electronic...

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6 MSE 2090: Introduction to Materials Science Chapter 19, Thermal Properties Heat capacity of metals – electronic contribution In addition to atomic vibrations (phonons), thermal excitation of electrons can also make contribution to heat capacity. To contribute to bulk specific heat, the valence electrons would have to receive energy from the thermal energy, ~kT. Thus, only a small fraction of electrons which are within kT of the Fermi level makes a contribution to the heat capacity. This contribution is very small and insignificant at room temperature. The electron contribution to c v is proportional to temperature, c v el = γ T and becomes significant (for metals only) at very low temperatures (remember that contribution of phonons c v ~ AT 3 at T 0K).
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7 MSE 2090: Introduction to Materials Science Chapter 19, Thermal Properties Heat capacity of various materials (at RT)
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8 MSE 2090: Introduction to Materials Science Chapter 19, Thermal Properties Thermal expansion Materials expand when heated and contract when cooled
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This note was uploaded on 02/14/2012 for the course MSE 2090 taught by Professor Leoindzhiglei during the Fall '10 term at UVA.

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Chapter 19.2 - Heat capacity of metals electronic...

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