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Title: Bulk Fermi surface of the Weyl type-II semimetallic candidate NbIrTe 4

Abstract

Recently, a new group of layered transition-metal tetra-chalcogenides was proposed via first-principles calculations to correspond to a new family of Weyl type-II semimetals with promising topological properties in the bulk as well as in the monolayer limit. In this paper, we present measurements of the Shubnikov-de Haas (SdH) and de Haas-van Alphen effects under high magnetic fields for the type-II Weyl semimetallic candidate NbIrTe4.We find that the angular dependence of the observed Fermi surface extremal cross-sectional areas agree well with our density functional theory (DFT) calculations supporting the existence ofWeyl type-II points in this material. Although we observe a large and nonsaturating magnetoresistivity in NbIrTe4 under fields all the way up to 35 T, Hall-effect measurements indicate that NbIrTe4 is not a compensated semimetal. The transverse magnetoresistivity displays a fourfold angular dependence akin to the so-called butterfly magnetoresistivity observed in nodal line semimetals. We conclude that the magnetoresistivity and its unconventional angular dependence are governed by the topography of the Fermi surface and the resulting anisotropy in effective masses and in carrier mobilities.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Luis Balicas / Florida State University; Florida State Univ., Tallahassee, FL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1594229
Alternate Identifier(s):
OSTI ID: 1512830
Grant/Contract Number:  
SC0002613
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 19; Journal ID: ISSN 2469-9950
Country of Publication:
United States
Language:
English

Citation Formats

Schönemann, Rico, Chiu, Yu-Che, Zheng, Wenkai, Quito, Victor L., Sur, Shouvik, McCandless, Gregory T., Chan, Julia Y., and Balicas, Luis. Bulk Fermi surface of the Weyl type-II semimetallic candidate NbIrTe4. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.99.195128.
Schönemann, Rico, Chiu, Yu-Che, Zheng, Wenkai, Quito, Victor L., Sur, Shouvik, McCandless, Gregory T., Chan, Julia Y., & Balicas, Luis. Bulk Fermi surface of the Weyl type-II semimetallic candidate NbIrTe4. United States. doi:10.1103/PhysRevB.99.195128.
Schönemann, Rico, Chiu, Yu-Che, Zheng, Wenkai, Quito, Victor L., Sur, Shouvik, McCandless, Gregory T., Chan, Julia Y., and Balicas, Luis. Wed . "Bulk Fermi surface of the Weyl type-II semimetallic candidate NbIrTe4". United States. doi:10.1103/PhysRevB.99.195128.
@article{osti_1594229,
title = {Bulk Fermi surface of the Weyl type-II semimetallic candidate NbIrTe4},
author = {Schönemann, Rico and Chiu, Yu-Che and Zheng, Wenkai and Quito, Victor L. and Sur, Shouvik and McCandless, Gregory T. and Chan, Julia Y. and Balicas, Luis},
abstractNote = {Recently, a new group of layered transition-metal tetra-chalcogenides was proposed via first-principles calculations to correspond to a new family of Weyl type-II semimetals with promising topological properties in the bulk as well as in the monolayer limit. In this paper, we present measurements of the Shubnikov-de Haas (SdH) and de Haas-van Alphen effects under high magnetic fields for the type-II Weyl semimetallic candidate NbIrTe4.We find that the angular dependence of the observed Fermi surface extremal cross-sectional areas agree well with our density functional theory (DFT) calculations supporting the existence ofWeyl type-II points in this material. Although we observe a large and nonsaturating magnetoresistivity in NbIrTe4 under fields all the way up to 35 T, Hall-effect measurements indicate that NbIrTe4 is not a compensated semimetal. The transverse magnetoresistivity displays a fourfold angular dependence akin to the so-called butterfly magnetoresistivity observed in nodal line semimetals. We conclude that the magnetoresistivity and its unconventional angular dependence are governed by the topography of the Fermi surface and the resulting anisotropy in effective masses and in carrier mobilities.},
doi = {10.1103/PhysRevB.99.195128},
journal = {Physical Review B},
number = 19,
volume = 99,
place = {United States},
year = {2019},
month = {5}
}

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