Fall 2016

Class meets MWF 1:30-2:20PM in Wean Hall 7316, fourth hour TBD

Website http://euler.phys.cmu.edu/widom/teaching/33-783

Professor Mike Widom, Office 6305 Wean Hall

e-mail: widom@cmu.edu, Phone: 412-268-7645

Office Hours: Any time I'm not busy (by appointment if desired)

**What you will learn:** This course presents an introduction to the physics of solid state materials, with an emphasis on traditional bulk crystalline materials but with occasional examples drawn from modern topics such as quantum wells, graphene, etc. Topics will be broadly separated into two segments. First, in the **physics of the solid continuum**, you will apply simple classical or quantum mechanical models to examine electronic, magnetic, vibrational, optical and thermal properties of matter. Next, in the **physics of the crystal lattice** you will learn diffraction techniques for probing the structure and symmetries of crystals and understand how diffraction of phonons and electrons create band structures and enable technologies such as semiconductor devices.

**What you should know:** This course will be fast-paced. Prior
familiarity with quantum mechanics is assumed at the graduate level of
33-755/756, and statistical mechanics/thermodynamics at the graduate
level of 33-765. Students with less preparation (e.g. quantum mechanics
at the undergraduate level of 33-445/446 and statistical mechanics at
the level of 33-341/342) should consider taking the undergraduate
Solid State Physics course 33-448 instead.

**Books:** Several excellent books are available in the E&S library. Of particular intrest are:

1. Ashcroft and Mermin, Solid State Physics, QC176.A83

2. Simon, The Oxford Solid State Basics, e-book http://search.ebscohost.com/login.aspx?direct=true&scope=site&db=nlebk&db=nlabk&AN=598413

3. Kittel, Introduction to Solid State Physics (8th edition), QC176.K5 2005

4. Goodstein, States of Matter, QC173.3.G66

Ashcroft and Mermin is the classic graduate-level textbook for the field and an important reference book to keep on hand. Simon is similar to Ashcroft and Mermin in its presentation, but with updated and slimmed-down content presented at an advanced undergraduate level. These two books will be the primary texts for the course, and the source of assigned homework problems. Kittel is the classic undergraduate-level textbook and presents the material in an alternative fashion. Goodstein has excellent background material on thermal physics, a chapter on solids offering a nice "thumbnail sketch" of this course, and a chapter on superconductivity.

**Grading:** Letter grades will be based on homework, take-home midterm exams and a final exam. Homework assignments will be supplemented with reading of articles from the original literature.

**Course Outline:**

Note this outline is only approximate. Actual class coverage can be found here. A collection of links to useful online material is here

**Physics of the solid continuum**- Free electron models (Drude/Sommerfeld)
- Elasticity and phonons

**Physics of the crystal lattice**- Crystal structure and diffraction
- Electron and phonon dispersion relations
- Metals and semiconductors