Fig. 2: Phonon dispersion of Na2CoSe2O. | npj Quantum Materials

Fig. 2: Phonon dispersion of Na2CoSe2O.

From: Phonon bunching induced strong four-phonon scattering for low lattice thermal conductivity in layered Na2CoSe2O

Fig. 2: Phonon dispersion of Na2CoSe2O.

a Anharmonically renormalized phonon dispersions at finite temperatures (from T = 300–900 K). Viridis colorbar indicates temperatures. Pink ellipses indicate acoustic-optical bunching. b Atomic projected dispersions at 300 K by Na, O, Co, and Se atoms. Plasma colorbars represent the atomic contribution to each mode at each eigenvector normalized to 1.

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