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- Thread starter ajl1989
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where c is the speed of sound and n is the number density.

c ~ sqrt(k/m)

where k is the bond strength and m is the atomic mass.

So in fact, you should expect T_D to rise with falling mass.

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mheslep

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So Debye doesn't only apply to plasmas?

where c is the speed of sound and n is the number density.

c ~ sqrt(k/m)

where k is the bond strength and m is the atomic mass.

So in fact, you should expect T_D to rise with falling mass.

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You can physically picture the Debye temperature as the temperature needed to activate all the phonon modes in a crystal.

A crystal with a large Debye temperature is going to be a stiffer crystal (Diamond is larger than Silicon is larger than Copper is larger than Lead). This is because the optical phonons have a higher frequency and therefore require greater energy to activate.

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