φ Berry phase and Zeeman splitting of Weyl semimetal TaP

J. Hu, J. Y. Liu, D. Graf, S. M.A. Radmanesh, D. J. Adams, A. Chuang, Y. Wang, I. Chiorescu, J. Wei, L. Spinu, Z. Q. Mao

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Abstract

The recent breakthrough in the discovery of Weyl fermions in monopnictide semimetals provides opportunities to explore the exotic properties of relativistic fermions in condensed matter. The chiral anomaly-induced negative magnetoresistance and φ Berry phase are two fundamental transport properties associated with the topological characteristics of Weyl semimetals. Since monopnictide semimetals are multiple-band systems, resolving clear Berry phase for each Fermi pocket remains a challenge. Here we report the determination of Berry phases of multiple Fermi pockets of Weyl semimetal TaP through high field quantum transport measurements. We show our TaP single crystal has the signatures of a Weyl state, including light effective quasiparticle masses, ultrahigh carrier mobility, as well as negative longitudinal magnetoresistance. Furthermore, we have generalized the Lifshitz-Kosevich formula for multiple-band Shubnikov-de Haas (SdH) oscillations and extracted the Berry phases of φ for multiple Fermi pockets in TaP through the direct fits of the modified LK formula to the SdH oscillations. In high fields, we also probed signatures of Zeeman splitting, from which the Landé g-factor is extracted.

Original languageEnglish (US)
Article number18674
JournalScientific reports
Volume6
DOIs
StatePublished - Jan 4 2016

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metalloids
fermions
signatures
oscillations
carrier mobility
transport properties
anomalies
single crystals

All Science Journal Classification (ASJC) codes

  • General

Cite this

Hu, J., Liu, J. Y., Graf, D., Radmanesh, S. M. A., Adams, D. J., Chuang, A., ... Mao, Z. Q. (2016). φ Berry phase and Zeeman splitting of Weyl semimetal TaP. Scientific reports, 6, [18674]. https://doi.org/10.1038/srep18674
Hu, J. ; Liu, J. Y. ; Graf, D. ; Radmanesh, S. M.A. ; Adams, D. J. ; Chuang, A. ; Wang, Y. ; Chiorescu, I. ; Wei, J. ; Spinu, L. ; Mao, Z. Q. / φ Berry phase and Zeeman splitting of Weyl semimetal TaP. In: Scientific reports. 2016 ; Vol. 6.
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Hu, J, Liu, JY, Graf, D, Radmanesh, SMA, Adams, DJ, Chuang, A, Wang, Y, Chiorescu, I, Wei, J, Spinu, L & Mao, ZQ 2016, 'φ Berry phase and Zeeman splitting of Weyl semimetal TaP', Scientific reports, vol. 6, 18674. https://doi.org/10.1038/srep18674

φ Berry phase and Zeeman splitting of Weyl semimetal TaP. / Hu, J.; Liu, J. Y.; Graf, D.; Radmanesh, S. M.A.; Adams, D. J.; Chuang, A.; Wang, Y.; Chiorescu, I.; Wei, J.; Spinu, L.; Mao, Z. Q.

In: Scientific reports, Vol. 6, 18674, 04.01.2016.

Research output: Contribution to journalArticle

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AU - Spinu, L.

AU - Mao, Z. Q.

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Hu J, Liu JY, Graf D, Radmanesh SMA, Adams DJ, Chuang A et al. φ Berry phase and Zeeman splitting of Weyl semimetal TaP. Scientific reports. 2016 Jan 4;6. 18674. https://doi.org/10.1038/srep18674