Is it possible to label the Debye temperature on a graph of

1. May 4, 2015

rwooduk

Resistivity. Take this graph for example, is the Debye temperature relavant here? Would the Debye temperature be the point where the semiconductor starts to become like a metal? i.e. where the curve goes from minimum to linear?

I understand the heat capacity relation i.e. from T^3 to 3nNk but struggling with the resistivity relation.

2. May 6, 2015

nasu

This temperature is related to the excitation energy of the donors.Why do you think it will be related to Debye temperature?

3. May 7, 2015

rwooduk

We have done several derivations that have different results for temperatures below and above the debye temperature. But I'm struggling to relate it to the resistivity of a material. Are you saying it would not represent anything significant on the above graph?

thanks for the reply!

4. May 7, 2015

nasu

Derivations of what?

5. May 7, 2015

rwooduk

Einstein’s approximation for the lattice contribution to the heat capacity
Phonon contribution to the thermal conductivity with the temperature
Electron-Phonon scattering: contribution to thermal electronic transport relaxation
Electron-Phonon scattering: contribution to charge electronic transport relaxation
Debye’s model for the lattice contribution to the heat capacity

All these for high and low debye temperatures