期刊
NEW JOURNAL OF PHYSICS
卷 17, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/17/9/093019
关键词
nexus; graphite; dirac lines
资金
- Academy of Finland through Center of Excellence program
- European Research Council [240362-Heattronics]
We consider the Z(2) topology of the Dirac lines, i.e., lines of band contacts, on an example of graphite. Four lines-three with topological charge N-1 = 1 each and one with N-1 = -1-merge together near the H-point and annihilate due to summation law 1 + 1 + 1 - 1 = 0. The merging point is similar to the real-space nexus, an analog of the Dirac monopole at which the Z(2) strings terminate.
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