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

In summary, the conversation focused on the relationship between temperature and resistivity, specifically in regards to the Debye temperature. The conversation delved into various derivations and their results for temperatures above and below the Debye temperature, but the speaker was struggling to understand the significance of the Debye temperature in relation to resistivity. They also discussed different contributions to thermal and charge electronic transport relaxation.
  • #1
rwooduk
762
59
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?

Image66.gif


I understand the heat capacity relation i.e. from T^3 to 3nNk but struggling with the resistivity relation.
 
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  • #2
This temperature is related to the excitation energy of the donors.Why do you think it will be related to Debye temperature?
 
  • #3
nasu said:
This temperature is related to the excitation energy of the donors.Why do you think it will be related to Debye temperature?

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
Derivations of what?
 
  • #5
nasu said:
Derivations of what?

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
 

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

1. Can the Debye temperature be labeled on any type of graph?

Yes, the Debye temperature can be labeled on a variety of graphs, such as a line graph, scatter plot, or bar graph.

2. What is the significance of labeling the Debye temperature on a graph?

The Debye temperature is an important parameter in materials science and solid-state physics, as it represents the temperature at which the atoms in a solid begin to vibrate. Labeling it on a graph can help visualize the behavior of a material at different temperatures.

3. How is the Debye temperature determined and measured?

The Debye temperature is typically calculated using theoretical models or experimental techniques, such as neutron scattering or specific heat measurements.

4. Can the Debye temperature change over time?

Yes, the Debye temperature can change as the temperature or composition of a solid changes. It can also vary depending on the type of material.

5. Is it possible to compare the Debye temperatures of different materials on a graph?

Yes, it is possible to compare the Debye temperatures of different materials on a graph. However, it is important to note that the Debye temperature is specific to each material and cannot be directly compared between different materials.

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