6533b828fe1ef96bd12887a1

RESEARCH PRODUCT

Nexus and Dirac lines in topological materials

subject

description

We consider the Z2 topology of the Dirac lines, i.e., lines of band contacts, on an example of graphite. Four lines—three with topological charge N1 = 1each and one with N1 = -1—merge together near the H-point and annihilate due to summation law1 ++-= 1110. The merging point is similar to the real-space nexus, an analog of the Dirac monopole at which the Z2 strings terminate. peerReviewed