Nexus and Dirac lines in topological materials

T.T. Heikkilä; G. E. Volovik

doi:10.1088/1367-2630/17/9/093019

Nexus and Dirac lines in topological materials

T.T. Heikkilä, G. E. Volovik

Research output: Contribution to journal › Article › Scientific › peer-review

104 Citations (Scopus)

216 Downloads (Pure)

Abstract

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 ${N}_{1}=1$ 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 Z2 strings terminate.

Original language	English
Article number	093019
Pages (from-to)	1-7
Journal	New Journal of Physics
Volume	17
Issue number	September 2015
DOIs	https://doi.org/10.1088/1367-2630/17/9/093019
Publication status	Published - 2015
MoE publication type	A1 Journal article-refereed

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10.1088/1367-2630/17/9/093019

Heikkilä_2015_New_J._Phys._17_093019Final published version, 1.1 MBLicence: CC BY

Mesoscopic heattronics: thermal and nonequilibrium effects and fluctuations in nanoelectronics
Golubev, D., Pöyhönen, K., Kauppila, V., Khan, R., Väyrynen, J., Virtanen, P., Silaev, M., Massel, F., Voutilainen, J., Laakso, M., Heikkilä, T. & Gomez Paez, S.
01/01/2010 → 31/12/2015
Project: EU: ERC grants

OtaNano – Low Temperature Laboratory
Savin, A. (Manager) & Rissanen, A. (Other)
OtaNano
Facility/equipment: Facility

Cite this

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title = "Nexus and Dirac lines in topological materials",

abstract = "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 ${N}_{1}=1$ 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 Z2 strings terminate.",

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AB - 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 ${N}_{1}=1$ 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 Z2 strings terminate.

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DO - 10.1088/1367-2630/17/9/093019

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ER -

Nexus and Dirac lines in topological materials

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Mesoscopic heattronics: thermal and nonequilibrium effects and fluctuations in nanoelectronics

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OtaNano – Low Temperature Laboratory

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