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  Magnetic field induced strong valley polarization in the three- dimensional topological semimetal LaBi

Kumar, N., Shekhar, C., Klotz, J., Wosnitza, J., & Felser, C. (2017). Magnetic field induced strong valley polarization in the three- dimensional topological semimetal LaBi. Physical Review B, 96(16): 161103, pp. 1-5. doi:10.1103/PhysRevB.96.161103.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-132C-E Version Permalink: http://hdl.handle.net/21.11116/0000-0005-C218-5
Genre: Journal Article

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 Creators:
Kumar, Nitesh1, Author              
Shekhar, Chandra2, Author              
Klotz, J.3, Author
Wosnitza, J.3, Author
Felser, Claudia4, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2Chandra Shekhar, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863428              
3External Organizations, ou_persistent22              
4Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: LaBi is a three-dimensional rocksalt-type material with a surprisingly quasi-two-dimensional electronic structure. It exhibits excellent electronic properties such as the existence of nontrivial Dirac cones, extremely large magnetoresistance, and high charge-carrier mobility. The cigar-shaped electron valleys make the charge transport highly anisotropic when the magnetic field is varied from one crystallographic axis to another. We show that the electrons can be polarized effectively in these electron valleys under a rotating magnetic field. We achieved a polarization of 60% at 2 K despite the coexistence of three-dimensional hole pockets. The valley polarization in LaBi is compared to the sister compound LaSb where it is found to be smaller. The performance of LaBi is comparable to the highly efficient bismuth.

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Language(s): eng - English
 Dates: 2017-10-032017-10-03
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 96 (16) Sequence Number: 161103 Start / End Page: 1 - 5 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008