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  Electric Control of Dirac Quasiparticles by Spin-Orbit Torque in an Antiferromagnet

Smejkal, L., Zelezny, J., Sinova, J., & Jungwirth, T. (2017). Electric Control of Dirac Quasiparticles by Spin-Orbit Torque in an Antiferromagnet. Physical Review Letters, 118(10): 106402, pp. 1-5. doi:10.1103/PhysRevLett.118.106402.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-E0FF-3 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C6D8-C
Genre: Journal Article

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 Creators:
Smejkal, L.1, Author
Zelezny, J.2, Author              
Sinova, J.1, Author
Jungwirth, T.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              

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 Abstract: Spin orbitronics and Dirac quasiparticles are two fields of condensed matter physics initiated independently about a decade ago. Here we predict that Dirac quasiparticles can be controlled by the spin-orbit torque reorientation of the Neel vector in an antiferromagnet. Using CuMnAs as an example, we formulate symmetry criteria allowing for the coexistence of topological Dirac quasiparticles and Neel spin-orbit torques. We identify the nonsymmorphic crystal symmetry protection of Dirac band crossings whose on and off switching is mediated by the Neel vector reorientation. We predict that this concept verified by minimal model and density functional calculations in the CuMnAs semimetal antiferromagnet can lead to a topological metal-insulator transition driven by the Neel vector and to the topological anisotropic magnetoresistance.

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Language(s): eng - English
 Dates: 2017-03-062017-03-06
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 118 (10) Sequence Number: 106402 Start / End Page: 1 - 5 Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1