Ultralow lattice thermal conductivity of the fully filled skutterudite YbFe 4 Sb1 2 due to the flat avoided-crossing filler modes

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Wigner Formulation of Thermal Transport in Solids (2021, background): “Green, Peierls’ LBTE conductivity (κP), which displays the universal T−1 asymptotics (dashed line) [28, 32, 44, 100].”
FourPhonon: An extension module to ShengBTE for computing four-phonon scattering rates and thermal conductivity (2021, background): “Instead of directly calculating scattering rates with potentially very high cost, one can first look at the weighted phase space as defined in Ref.[36].”
On the tuning of electrical and thermal transport in thermoelectrics: an integrated theory–experiment perspective (2016, background): “It is worth noting that suppressions of κL by the fillers cannot be fully accounted for by the introductions of additional optic phonons, based on the thirdorder IFC calculations.(111,140,141) The κL for the unfilled CoSb3 can be perfectly reproduced by these calculations;(111) for fully filled skut”