Harmonic vs Anharmonic Interactions in Lattice

Tags: anharmonic, harmonic, interactions, lattice
YAHA is offline
Apr28-13, 08:18 PM
P: 120
I am currently working my way through Kitel's Solid State Physics book. When discussing the consequences of the harmonic assumption (quadratic degree of freedom for interatomic lattice interactions), he states that

1) the lattice waves do not interact
2) a single wave does not change form or decay over time.

Why is that?
Phys.Org News Partner Physics news on Phys.org
Chameleon crystals could enable active camouflage (w/ video)
Atomic switcheroo explains origins of thin-film solar cell mystery
X-ray laser experiment explores how specially shocked material gets stronger
Jano L.
Jano L. is offline
Apr29-13, 01:53 AM
P: 1,030
It is basic property of the model. Coupled harmonic oscillators move in such a way that their motion can be written as sum of motions due to standing waves; these standing waves behave as independent harmonic oscillators.

Register to reply

Related Discussions
primitive lattice vectors, reciprocal lattice, wigner seitz cell Atomic, Solid State, Comp. Physics 1
monte carlo anharmonic simulation (need help deducing my lattice spacing) Advanced Physics Homework 0
Lattice of harmonic oscillators - Matlab Atomic, Solid State, Comp. Physics 1
Wen bosonic lattice model, chiral interactions, noncommutative space Atomic, Solid State, Comp. Physics 2
One-dimensional monatomic chain; square lattice; hcp close packed 2D lattice Advanced Physics Homework 0