Science Advances

This PDF file includes:

• fig. S1. Powder XRD patterns of melt-spun ribbons.
  
• fig. S2. FESEM images of two surfaces of ribbons.
  
• fig. S3. EDS of the free surface of ribbon containing 25 wt % extra Te.
  
• fig. S4. BSE images of SPS samples and ejected material.
  
• fig. S5. Carrier concentration and mobility of samples.
  
• table S1. Room-temperature physical parameters of samples.

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