An Introduction to Thermal Physics
1st Edition
ISBN: 9780201380279
Author: Daniel V. Schroeder
Publisher: Addison Wesley
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Chapter 8.2, Problem 17P
To determine
The Boltzmann factors of the states of the system, the partition function, probabilities of finding the dipoles parallel and antiparallel and plot of these probabilities as a function of
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Consider an Ising model of just two elementary dipoles, whose mutual interaction energy is ± E. Enumerate the states of this system and write down their Boltzmann factors. Calculate the partition function. Find the probabilities of finding the dipoles parallel and antiparallel , and plot these probabilities as a function of kT/ E. Also calculate and plot the average energy of the system. At what temperatures are you more likely to find both dipoles pointing up than to find one up and one down?
There is a one-dimensional solid lattice with two basis atoms of
mass m and M, respectively (lattice constant = a). Let the interaction
between atoms act only on adjacent atoms, and let the bonding force
coefficient be C (Fig.).
M
C
C
a
a) Draw the Brillouin zone and the approximate phonon
dispersion w=w(K), and write the name of each phonon
branch
b)
When K = TT/a, write down the normal mode energy and
discuss the relative motion of adjacent atoms.
c) If two atoms are of the same kind (m = M), plot the Brillouin
%3D
zone and phonon dispersion w=w(K).
Find q, △U, and the work done for path ACB for the mono atomic ideal gas system.
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