Weyl points of mechanical diamond

  title={Weyl points of mechanical diamond},
  author={Yuta Takahashi and Toshikaze Kariyado and Yasuhiro Hatsugai},
  journal={Physical Review B},
A spring-mass model arranged in a diamond structure---mechanical diamond---is analyzed in terms of topology in detail. We find that, additional springs connecting the next-nearest-neighboring pairs of mass points and the modulation of the mass parameters to the pristine mechanical diamond generates several pairs of Weyl points in the frequency dispersion. Evolution of the Weyl point mapping in the Brillouin zone against uniform outward tension is shown and explained from the view point of the… 
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