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PH 409: Introduction to Condensed Matter Physics
Course instructor : Kantimay Das Gupta
July 2012
Problem Set 1:
1. Show that the distance between two points in a crystal, whose positions are given by:
rm = m1 a1 + m2 a2 + m3 a3
rn = n1 a1 + n2 a2 + n3

CHAPTER 1
^ ^ ^ ^ ^ ^ 1. The vectors x + y + z and - x - y + z are in the directions of two body diagonals of a cube. If is the angle between them, their scalar product gives cos = 1/3, whence = cos -1 1/ 3 = 90 + 19 28' = 109 28' . 2. The plane (100) is

Chapter 1
Describing a collection of atoms:
Structure factor and lattice
Lecture notes for PH409 (Jul-Dec 2012): K. Das Gupta
In elementary quantum mechanics, we usually work with a single particle. In condensed matter physics we need to describe lots of

19 Jul 04
X-rayDiff.1
X-RAY DIFFRACTION (DEBYE-SCHERRER METHOD) In this experiment, the diffraction patterns of x-rays of known wavelengths will be analysed to determine the lattice constant for the diffracting crystal (NaCl). Theory: In 1912, Max von Lau