@misc{indiciae2fe682fd88d8,
  title = {Gapless Criterion for Crystals from Effective Axion Field},
  author = {Yu, Jiabin and Song, Zhi-Da and Liu, Chao-Xing},
  year = {2020},
  doi = {10.1103/physrevlett.125.036401},
  url = {https://www.osti.gov/biblio/1783182},
  note = {Source identifier: 1783182}
}