What is crystal “supermodulation”?
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the pair density wave in cuprates, and during my reading I came across a term "crystal supermodulation". I believe it relates to BSCCO.
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Explanation:
The supermodulation itself is an incommensurate, approximately periodic, displacive modulation of the atomic sites of the crystal. ... The effect of the supermodulation is to displace each atom, μ, whose unperturbed position within the unit cell we denote x μ, by a displacement vector u μ(φ)
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