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  Optical signature of Weyl electronic structures in tantalum pnictides TaPn (Pn = P, As)

Kimura, S.-i., Yokoyama, H., Watanabe, H., Sichelschmidt, J., Süß, V., Schmidt, M., et al. (2017). Optical signature of Weyl electronic structures in tantalum pnictides TaPn (Pn = P, As). Physical Review B, 96(7): 075119, pp. 1-7. doi:10.1103/PhysRevB.96.075119.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-D04E-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-D050-B
Genre: Journal Article

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 Creators:
Kimura, Shin-ichi1, Author
Yokoyama, Hiroko1, Author
Watanabe, Hiroshi1, Author
Sichelschmidt, Jörg2, Author              
Süß, Vicky3, Author              
Schmidt, Marcus4, Author              
Felser, Claudia5, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Jörg Sichelschmidt, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863468              
3Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
4Marcus Schmidt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863415              
5Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: To investigate the electronic structure of Weyl semimetals TaPn (Pn = P, As), optical conductivity [ sigma(omega)] spectra are measured over a wide range of photon energies and temperatures, and these measured values are comparedwith band calculations. Two significant structures can be observed: a bending structure at (h) over bar omega similar to 85 meV in TaAs, and peaks at (h) over bar omega similar to 50 meV (TaP) and similar to 30 meV (TaAs). The bending structure can be explained by the interband transition between saddle points connecting a set of W-2 Weyl points. The temperature dependence of the peak intensity can be fitted by assuming the interband transition between saddle points connecting a set of W-1 Weyl points. Owing to the different temperature dependence of the Drude weight in both materials, it is found that the Weyl points of TaAs are located near the Fermi level, whereas those of TaP are further away.

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Language(s): eng - English
 Dates: 2017-08-102017-08-10
 Publication Status: Published in print
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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 (7) Sequence Number: 075119 Start / End Page: 1 - 7 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008