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  Impurity screening and stability of Fermi arcs against Coulomb and magnetic scattering in a Weyl monopnictide

Sessi, P., Sun, Y., Bathon, T., Glott, F., Li, Z., Chen, H., et al. (2017). Impurity screening and stability of Fermi arcs against Coulomb and magnetic scattering in a Weyl monopnictide. Physical Review B, 95(3): 035114, pp. 1-6. doi:10.1103/PhysRevB.95.035114.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-653F-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-0D4D-C
Genre: Journal Article

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 Creators:
Sessi, Paolo1, Author
Sun, Yan2, Author              
Bathon, Thomas1, Author
Glott, Florian1, Author
Li, Zhilin1, Author
Chen, Hongxiang1, Author
Guo, Liwei1, Author
Chen, Xiaolong1, Author
Schmidt, Marcus3, Author              
Felser, Claudia4, Author              
Yan, Binghai5, Author              
Bode, Matthias1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Marcus Schmidt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863415              
4Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              
5Binghai Yan, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863427              

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 Abstract: We present a quasiparticle interference study of clean and Mn surface-doped TaAs, a prototypical Weyl semimetal, to test the screening properties as well as the stability of Fermi arcs against Coulomb and magnetic scattering. Contrary to topological insulators, the impurities are effectively screened in Weyl semimetals. The adatoms significantly enhance the strength of the signal such that theoretical predictions on the potential impact of Fermi arcs can be unambiguously scrutinized. Our analysis reveals the existence of three extremely short, previously unknown scattering vectors. Comparison with theory traces them back to scattering events between large parallel segments of spin-split trivial states, strongly limiting their coherence. In sharp contrast to previous work [R. Batabyal et al., Sci. Adv. 2, e1600709 (2016)], where similar but weaker subtle modulations were interpreted as evidence of quasiparticle interference originating from Femi arcs, we can safely exclude this being the case. Overall, our results indicate that intra- as well as inter-Fermi arc scattering are strongly suppressed and may explain why-in spite of their complex multiband structure-transport measurements show signatures of topological states in Weyl monopnictides.

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Language(s): eng - English
 Dates: 2017-10-012017-10-01
 Publication Status: Published in print
 Pages: -
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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: 95 (3) Sequence Number: 035114 Start / End Page: 1 - 6 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008