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Physics
Atomic and Condensed Matter
Do acoustic phonons disappear in charge density wave states?
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[QUOTE="Dr_Nate, post: 6270333, member: 670127"] Please provide more background to your question. Not everyone has worked in your subfield. Of the many confusing points, I don't know what you means when you say phonons condense. Could you post a phonon spectrum to illustrate what you are thinking because I also don't know what you mean by gapless acoustic phonons. One thing I can say is that acoustic phonons are so named because the low Q phonon spectrum is linear and the slope is a measure of the speed of sound of the material. If these didn't exist you would have an unphysical sample that wouldn't transmit sound. [/QUOTE]
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Physics
Atomic and Condensed Matter
Do acoustic phonons disappear in charge density wave states?
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