Science Advances

Supplementary Materials

This PDF file includes:

  • Supplementary Text
  • table S1. Size of samples.
  • table S2. Phonon velocity along the high-symmetry axes.
  • fig. S1. Thermal resistance of BP samples and manganin.
  • fig. S2. Reproducibility of thermal conductivity data.
  • fig. S3. Specific heat.
  • fig. S4. Phonon dispersions at low energies.
  • References (46–55)

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