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First-principles calculation of the lattice thermal conductivities of α-, β-, and γ-SiN
Kazuyoshi Tatsumi, Atsushi Togo, Isao Tanaka
Lattice thermal conductivities (LTCs) of α-, β-, and γ-SiN single crystals are investigated from ab initio anharmonic lattice dynamics, within the single-mode relaxation-ti…
Mode-decomposition based on crystallographic symmetry in the band-unfolding method
Yuji Ikeda, Abel Carreras, Atsuto Seko +2
The band-unfolding method is widely used to calculate the effective band structures of a disordered system from its supercell model. The unfolded band structures show the crystallo…
Suppression of lattice thermal conductivity by mass-conserving cation mutation in multi-component semiconductors
Taizo Shibuya, Jonathan M. Skelton, Adam J. Jackson +4
In semiconductors almost all heat is conducted by phonons (lattice vibrations), which is limited by their quasi-particle lifetimes. Phonon-phonon interactions represent scattering…
Anharmonicity in the high-temperature Cmcm phase of SnSe: soft modes and three-phonon interactions
Jonathan M. Skelton, Lee A. Burton, Stephen C. Parker +8
The layered semiconductor SnSe is one of the highest-performing thermoelectric materials known. We demonstrate, through a first-principles lattice-dynamics study, that the high-tem…