Note: Some Lectures
(Power Point) are under
construction!

A GOAL is to post a lecture before we discuss a topic in class, but I can't promise!

COPYRIGHT: All lectures are copyrighted by C.W. Myles!

No reproduction &/or use of them other than by students in this course is allowed!

A GOAL is to post a lecture before we discuss a topic in class, but I can't promise!

COPYRIGHT: All lectures are copyrighted by C.W. Myles!

No reproduction &/or use of them other than by students in this course is allowed!

- Phonons II: Thermal Properties
- (Material from Kittel's Ch. 5 plus many outside sources.)
- Note, except for Part I, all lectures here were prepared by others & found on the internet.
- I've posted more than one
discussion of each topic in order for you to read more than one
viewpoint on each topic. Looking at the same physics concepts from more
than one viewpoint will hopefully increase your understanding. NOTE!
Thermal Properties of
materials can still relevant to modern research!! See a
**2008 Publication**by me, with students & collaborators: "Thermal Properties of Guest-Free Si_{136}and Ge_{136}Clathrates: A First-Principles Study," K. Biswas, C.W. Myles, M. Sanati, & G.S. Nolas, Journal of Applied Physics 104, 033535 (2008). Download it**Here****.**

- Properties Obtained in the Harmonic Approximation
- for the Lattice Vibrations

**Part I****:****Quantum Mechanical Lattice Vibrations. Phonons 1.****Mean Thermal Energy & Lattice Heat Capacity.****Einstein & Debye Models of Lattice Heat Capacity****.****Part II****:****Phonons 2.****Another Discussion of the Einstein & Debye Models.****.****Part III****:****Phonons 3.****Another Discussion the Einstein & Debye Models.****.**- Properties Requiring Anharmonic Effects
- for the Lattice Vibrations
**Part IV****:****Anharmonic Effects 1.****Thermal Conductivity & Thermal Expansion.****.****Part V****:****Anharmonic Effects 2.****Thermal Conductivity. Phonon-Phonon Scattering.****Kinetic Theory.****.****Part VI****:****Thermal Expansion.****.****Part VII****:****Overview of Thermal Properties.****Heat Capacity, Thermal Conductivity, Thermal Expansion.****.****Part VIII****:****Another Discussion of Thermal Properties.****Heat Capacity, Thermal Conductivity, Thermal Expansion.****.****Part IX****:****More Thermal Properties Discussion. .****Heat Capacity, Thermal Conductivity, Thermal Expansion.****.****Part X****:****Thermal Conductivity.****.**

**Part XI****:****Summary of Chapter 5 Topics.**

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