Phonon dispersion in 1-layer cuprate HgBa2CuO4+d
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![Figure 4. Phonon dispersion in HgBa 2 CuO 4+δ , along the main symmetry directions with the reduced vector in-plane ([ ξ ,0,0] and [ ξ , ξ ,0]), and perpendicular to the a*b*](https://thumb-eu.123doks.com/thumbv2/123doknet/13299131.397655/8.892.210.676.125.455/figure-phonon-dispersion-symmetry-directions-reduced-vector-perpendicular.webp)
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