Ontology highlight
ABSTRACT:
SUBMITTER: Cai X
PROVIDER: S-EPMC7064592 | biostudies-literature | 2020
REPOSITORIES: biostudies-literature
Cai Xiangxi X Ye Liping L Qiu Chunyin C Xiao Meng M Yu Rui R Ke Manzhu M Liu Zhengyou Z
Light, science & applications 20200310
Dirac semimetals, the materials featuring fourfold degenerate Dirac points, are critical states of topologically distinct phases. Such gapless topological states have been accomplished by a band-inversion mechanism, in which the Dirac points can be annihilated pairwise by perturbations without changing the symmetry of the system. Here, we report an experimental observation of Dirac points that are enforced completely by the crystal symmetry using a nonsymmorphic three-dimensional phononic crysta ...[more]