Dynamic structure factor S(q,w) and dispersion curve inset for the Heisenberg ferromagnet on the simple cubic lattice with L20 at T 0.4 T c. The momentum transfer is in the 100 direction, that is, q (q,0,0), and the Brillouin zone boundary is at q.
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Understanding the Dynamic Structure Factor (DSF)
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The Dynamic Structure Factor (S(Q,ω)) is like a movie of how atoms move in a material. Instead of just knowing where atoms are, it tells us how they move together over time:
