Measurements of the thermal conductivity above 30 K of mixed crystals with controlled disorder, (KBr)1-x(KCN)x, (NaCl)1-x, (NaCn)x Zr1-xYxO2-x/2, and Ba1-xLaxF2+x, support the idea of a lower limit to the thermal conductivity of disordered solids. In each case, as x is increased, the data approach the calculated minimum conductivity based on a model originally due to Einstein. These measurements support the claim that the lattice vibrations of these disordered crystals are essentially the same as those of an amorphous solid.
ASJC Scopus subject areas
- Condensed Matter Physics