Physics 223A, Fall 2009

Concepts and phenomena of condensed matter physics

 


Prof. Mark Sherwin

Broida 4119

Office hours:  Thursday 4-6 pm and by appointment

 

TA:  Andre van Rynbach

Office hour:  TBA


                       

Scope:  This class will cover the fundamentals of solid state physics, which is sometimes called ŇhardÓ condensed matter physics (as opposed to ŇsoftÓ condensed matter physics).  The class will move rather quickly through the topics listed below, following the order in the textbook by Mihaly and Martin.  More detail is provided at the end of the syllabus.

 

Crystal structures (2 lectures)

Interatomic forces and vibrations (3 lectures)

Electronic band structure (3 lectures)

Density of states (3 lectures)

Elementary excitations (2 lectures)

Thermodynamics of non-interacting quasiparticles (3 lectures)

Transport properties (4 lectures)

Optical properties and interactions (4 lectures)

Mesoscopic and nanoscale systems (3 lectures)

 

Textbooks: 

 

Mihaly and Martin, Solid State Physics, Problems and Solutions, ISBN978-3-527-40855-9.  (available at the UCSB bookstore or your favorite online source)

 

There exists a very large number of textbooks on solid state physics.  The subject is so vast that most of the textbooks are massive and expensive.  Many of these are on reserve in the UCSB library.  I have chosen a rather slim, new and unconventional textbook by Mihaly and Martin (M&M) for the class.  The focus of M&M is on solving problems in solid state physics.  Each chapter begins with a few pages which quote (without derivation) and place into context the most important results corresponding to the chapter title.  The reader is referred to one or more of the conventional textbooks for a complete understanding and derivation of a particular result.   I find M&M extremely useful as a reference, because I donŐt have to flip through 600 pages to find a particular key result.  It also has a lot of good problems, which we will use in a variety of ways.

 

Jeno Solyom, Fundamentals of the physics of solids, volume I , Structure and dynamics.

http://www.springerlink.com/content/x1052n/.  Free online.

 

Jeno Solyom, Fundamentals of the physics of solids, volume II , Electronic properties. http://www.springerlink.com/content/qp8864/.  Free online.

 

M&M needs to be used together with one or more of the conventional textbooks.  I have chosen a relatively new, 2-volume textbook by Solyom for several reasons:  I find that it is well-written and very clear, is at an appropriate level of sophistication for a graduate course, covers most of the material I would like to cover, and is very inexpensive for UC students and staff.  Any solid state physicist, however, will need several textbooks in his or her library.  I recommend browsing through the textbooks that are on reserve in the library to find the ones which suit you.

 

Grading:  

 

Problem sets:  40%.  Due 5 pm in AndrŽŐs mailbox

Midterm exam (take-home with time limit):  20%

Final exam (take-home with time limit):  40%


Tentative schedule of lectures, reading and assignments

 

Date

Lecture no.

Topic

Reading M&M

Reading Solyom

Reading Davies

Interesting web links

Assignment

solutions

9/25

1

Introduction

 

Chapter 1 and 2

 

 

 

 

M28

 

No class—Yom Kippur

Chapter 1

 

 

 

 

 

30

2

Crystal symmetries

 

Chapter 5

 

Bravais lattice song

1  (due in class)

 

10/2

3

Determination of crystal structure

 

Chapter 8

 

x-ray diffraction

 

 

M5

4

Laue condition, Ewald construction, demo.

Chapter 2

Chapter 11,13

 

 

 

 

7

5

Lattice vibrations in 1-D

 

 

 

 

 

 

9

6

Optical phonons; phonons in 2 and 3D

 

 

 

 

2

2sols

M12

7

Electronic Band Structure

Floquet-Bloch theorem

Chapter 3

Chapters 17-19

 

 

 

 

14

8

Hamiltonian with periodic potential expanded in plane waves

 

 

 

Lecture notes

 

 

16

9

Matrix form of Hamiltonian;  bandgaps; exact diagonalization

 

 

 

Lecture notes

3

3sols

M19

10

Tight binding model

Phonon density of states

Chapter 4

 

 

 

 

 

21

11

Counting states in 1, 2 and 3D

 

12.1, 12.2

 

 

 

 

23

12

Density of states in 1, 2, and 3D

 

 

 

 

4

4sols

M26

13

2D electron gases in GaAs/AlGaAs quantum wells

 

 

 

 

 

 

28

14

2DEG in a magnetic field

 

 

QHE chapter

QHE chapter

 

 

30

15

Landau levels

 

 

 

 

 

 

M11/2

16

Classical 2DEG in B field;  resistivity and conductivity tensors

 

 

 

 

 

 

4

17

Shubnikov-de-Haas oscillations in 2DEG

 

 

 

Notes Lectures13-17

 

 

6

18

Start take-home midterm in class.

 

 

 

 

Hand out take-home midterm

 

M9

19

The quantum conductance of a single quantum channel

 

 

 

 

Return take-home midterm

 

11

 

VeteranŐs day

 

 

 

 

 

 

13

20

The Quantum Hall effect

 

 

 

 

 

 

M16

21

Equilibrium thermodynamic properties of solids, and why you should care about them.

Chapter 6

 

 

 

 

 

18

22

Specific heat of insulators

 

12.3.2

 

 

 

 

 

20

23

Specific heat of metals

 

16.2.7

 

 

 

5

 

M23

24

Electron and heat currents in an  electron gas:  perturbed distribution functions

Chapter 7

16.3.2

 

 

 

 

25

25

Electric and heat currents in an electron gas

 

16.3.3

 

Notes Lectures 19-25

 

 

27

 

Thanksgiving

 

 

 

 

 

 

M30

26

Thermoelectric phenomena

 

16.3.4

 

 

 

 

12/2

27

Thermal conductivity, electrical conductivity, and thermopower in Sommerfeld model

 

 

 

Notes Lectures 26-27

6

 

4

28

Calculating density of states.

 

 

 

 

Hand out take-home final.

 

 

 

Announcements:

 

There is now a listserv for the class.  Visit https://mail.physics.ucsb.edu/mailman/listinfo/phys223 to join and get announcements.