Can anyone help with an analysis of phonon spectrum?

06 December 2013 1 9K Report

I have an idea about acoustic and optical modes. In the spectrum how we can say particular mode is Raman or IR active? Could you suggest any video lecture or pdf for this question?

Hans Ulrich Suter

That is rather standard, IR active is a mode which changes its dipolmoment...a rather easy text I found is

http://www.reciprocalnet.org/edumodules/symmetry/pointgroups/use.html

but any other text about group theor and spectroscopy will do....

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