mp-568436/Sr7GeN6/anharm

Harmonic properties

../../_images/fig_bandos_pr7282.png

(a) Phonon dispersion with participation ratio and DOS

../../_images/fig_thermo7282.png

(b) Thermodynamic properties

Grüneisen parameters

../../_images/fig_gru_all3068.png

(a) Grüneisen parameters

../../_images/fig_gruneisen3068.png

(b) Phonon dispersion with Grüneisen parameters

Thermal conductivity

3-phonon (LASSO) — q-mesh: 6x11x5, supercell: 1x2x1

../../_images/fig_kappa5812.png

(a) Temperature-dependent lattice thermal conductivity

../../_images/fig_kappa_vs_grain_size3111.png

(b) Peierls lattice thermal conductivity w.r.t grain size

Phonon lifetime and scattering rates

../../_images/fig_lifetime3043.png

(a) Phonon lifetime due to phonon-phonon scattering

../../_images/fig_scat_rates3042.png

(b) Phonon scattering rates

Cumulative and spectral thermal conductivity

../../_images/fig_cumu_frequency3043.png

(a) Spectral and cumulative thermal conductivity w.r.t frequency

../../_images/fig_cumu_mfp3042.png

(b) Spectral and cumulative thermal conductivity w.r.t MFP

Force constants

../../_images/fig_fc27048.png

(a) Force constants w.r.t atomic distance

Summary

../../_images/fig_kappa5813.png

(a) Temperature-dependent lattice thermal conductivity

../../_images/fig_times12925.png

(b) Computation time