I read some literature about the analytical model for the thermal conductivity of nanostructures, fount that there are two methods for us to get the thermal conductivity from the phonon properties:
phonon spectrum method;
wave vector method.
You can see the details in Patrice Chantrenne's...
Thank you!Your reply is vividly,it did help me a lot about the physical meaning of phonon and the thermal conductivity.
May I ask you another question?
If I got spectra of two materials at the same temperature, how can I distinguish which material's thermal conduction is better (more...