Ontology highlight
ABSTRACT:
SUBMITTER: Hirayama M
PROVIDER: S-EPMC5241691 | biostudies-literature | 2017 Jan
REPOSITORIES: biostudies-literature
Nature communications 20170111
In nodal-line semimetals, the gaps close along loops in k space, which are not at high-symmetry points. Typical mechanisms for the emergence of nodal lines involve mirror symmetry and the π Berry phase. Here we show via ab initio calculations that fcc calcium (Ca), strontium (Sr) and ytterbium (Yb) have topological nodal lines with the π Berry phase near the Fermi level, when spin-orbit interaction is neglected. In particular, Ca becomes a nodal-line semimetal at high pressure. Owing to nodal li ...[more]