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π Berry phase and Zeeman splitting of Weyl semimetal TaP.

Title: π Berry phase and Zeeman splitting of Weyl semimetal TaP.
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Name(s): Hu, J, author
Liu, J Y, author
Graf, D, author
Radmanesh, S M A, author
Adams, D J, author
Chuang, A, author
Wang, Y, author
Chiorescu, I, author
Wei, J, author
Spinu, L, author
Mao, Z Q, author
Type of Resource: text
Genre: Journal Article
Text
Date Issued: 2016-01-04
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: 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 π 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 π 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.
Identifier: FSU_pmch_26726050 (IID), 10.1038/srep18674 (DOI), PMC4698660 (PMCID), 26726050 (RID), 26726050 (EID), srep18674 (PII)
Publication Note: This NIH-funded author manuscript originally appeared in PubMed Central at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4698660.
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_pmch_26726050
Owner Institution: FSU
Is Part Of: Scientific reports.
2045-2322
Issue: vol. 6

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Hu, J., Liu, J. Y., Graf, D., Radmanesh, S. M. A., Adams, D. J., Chuang, A., … Mao, Z. Q. (2016). π Berry phase and Zeeman splitting of Weyl semimetal TaP. Scientific Reports. Retrieved from http://purl.flvc.org/fsu/fd/FSU_pmch_26726050