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  Pressure-induced superconductivity and modification of Fermi surface in type-II Weyl semimetal NbIrTe4

Mu, Q.-G., Fan, F.-R., Borrmann, H., Schnelle, W., Sun, Y., Felser, C., et al. (2021). Pressure-induced superconductivity and modification of Fermi surface in type-II Weyl semimetal NbIrTe4. npj Quantum Materials, 6: 55, pp. 1-7. doi:10.1038/s41535-021-00357-y.

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Mu, Qing-Ge1, Author              
Fan, Feng-Ren1, Author              
Borrmann, Horst2, Author              
Schnelle, Walter3, Author              
Sun, Yan1, Author              
Felser, Claudia4, Author              
Medvedev, Sergey5, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2Horst Borrmann, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863410              
3Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
4Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              
5Sergiy Medvediev, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863438              

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 Abstract: Weyl semimetals (WSMs) hosting Weyl points (WPs) with different chiralities attract great interest as an object to study chirality-related physical properties, topological phase transitions, and topological superconductivity. Quantum oscillation measurements and theoretical calculations imply that the type-II WPs in NbIrTe4 are robust against the shift of chemical potential making it a good material for pressure studies on topological properties. Here we report the results of electrical transport property measurements and Raman spectroscopy studies under pressures up to 65.5 GPa accompanied by theoretical electronic structure calculations. Hall resistivity data reveal an electronic transition indicated by a change of the charge carrier from multiband character to hole-type at similar to 12 GPa, in agreement with the calculated Fermi surface. An onset of superconducting transition is observed at pressures above 39 GPa, with critical temperature increasing as pressure increases. Moreover, theoretical calculations indicate that WPs persist up to highly reduced unit cell volume (-17%), manifesting that NbIrTe4 is a candidate of topological superconductor.

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Language(s): eng - English
 Dates: 2021-06-012021-06-01
 Publication Status: Published in print
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Title: npj Quantum Materials
  Other : npj Quantum Mater.
Source Genre: Journal
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Publ. Info: [London] : Nature Publishing Group
Pages: - Volume / Issue: 6 Sequence Number: 55 Start / End Page: 1 - 7 Identifier: ISSN: 2397-4648
CoNE: https://pure.mpg.de/cone/journals/resource/2397-4648