Kondo-like phonon scattering in thermoelectric clathrates

@article{Ikeda2019KondolikePS,
  title={Kondo-like phonon scattering in thermoelectric clathrates},
  author={Matthias Ikeda and Holger Euchner and X. D. Yan and Petr Tome{\vs} and Andrey Prokofiev and L. Prochaska and G{\"u}nther Lientschnig and Robert Svagera and Stefanie Hartmann and Elena Gati and Michael Lang and Silke Paschen},
  journal={Nature Communications},
  year={2019},
  volume={10}
}
Crystalline solids are generally known as excellent heat conductors, amorphous materials or glasses as thermal insulators. It has thus come as a surprise that certain crystal structures defy this paradigm. A prominent example are type-I clathrates and other materials with guest-host structures. They sustain low-energy Einstein-like modes in their phonon spectra, but are also prone to various types of disorder and phonon-electron scattering and thus the mechanism responsible for their ultralow… 

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