Phys 155-12!
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| * ~+'''Lecture 7'''+~, ~-Jan. 31-~: <<la("Lecture 07 -- Phonon Branches.pdf", "Acoustic phonons and optical phonons")>> {{{#!wiki comment * <<ln("Lecture 07 Activity -- Visualizing Some Phonon Modes.pdf", "Classroom activity sheets")>>: <<color("Please note that for any class room activity sheets for which solutions are not available here, you can write your solutions and submit them. That will give you extra credit. There is no time limit for this. Even if other students have submitted solutions, you can submit yours if yours point out some nice aspect previously neglected. Even if the point was explained in class, do not hesitate expressing the same point in your language -- it is very important! The extra credit points will be good for recovering from some lost points in homework etc.", MidnightBlue)>> }}} |
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Lecture 7, Jan. 31: Acoustic phonons and optical phonons
Classroom activity sheets: Please note that for any class room activity sheets for which solutions are not available here, you can write your solutions and submit them. That will give you extra credit. There is no time limit for this. Even if other students have submitted solutions, you can submit yours if yours point out some nice aspect previously neglected. Even if the point was explained in class, do not hesitate expressing the same point in your language -- it is very important! The extra credit points will be good for recovering from some lost points in homework etc.
Lecture 6, Jan. 26: BvK Boundary Condition, Phonons
Lecture 5, Jan. 24: Structure Factor, Atomic Form Factor
Lecture 4, Jan. 19: Diffraction, Bloch sum
Crystal structure data base: use "Demo", which is often quite good enough.
Corrections: two words (one in page 4 and the other in page 5: see words marked in red).
Lecture 3, Jan. 17: Cell and Reciprocal Lattice
Classroom activity sheets: submit your answers to me! (optional)
Lecture 2, Jan. 12: Basis, Bravais Lattice, Miller Indices
Please note step 5 of page 4 – Miller indices are integers!
Additions: pages 2 (black hand-writing) and 4 (red on rule 5).
Lecture 1, Jan. 10: Atoms, Molecules
Page 2: some more explanation added to the Bohr-Sommerfeld quantization rule. — Sam, 9:59PM, Jan 11, 2012