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Bulk Fermi Surfaces Of The Dirac Type-ii Semimetallic Candidates Mal3 (where M = V, Nb, And Ta)

Title: Bulk Fermi Surfaces Of The Dirac Type-ii Semimetallic Candidates Mal3 (where M = V, Nb, And Ta).
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Name(s): Chen, K.-W., author
Lian, X., author
Lai, Y., author
Aryal, N., author
Chiu, Y.-C., author
Lan, W., author
Graf, D., author
Manousakis, E., author
Baumbach, R. E., author
Balicas, L., author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2018-05-15
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: We report a de Haas-van Alphen (dHvA) effect study on the Dirac type-II semimetallic candidates MAl3 (where, M = V, Nb and Ta). The angular dependence of their Fermi surface (FS) cross-sectional areas reveals a remarkably good agreement with our first-principles calculations. Therefore, dHvA supports the existence of tilted Dirac cones with Dirac type-II nodes located at 100, 230 and 250 meV above the Fermi level epsilon(F) for VAl3 , NbAl3 and TaAl3 respectively, in agreement with the prediction of broken Lorentz invariance in these compounds. However, for all three compounds we find that the cyclotron orbits on their FSs, including an orbit nearly enclosing the Dirac type-II node, yield trivial Berry phases. We explain this via an analysis of the Berry phase where the position of this orbit, relative to the Dirac node, is adjusted within the error implied by the small disagreement between our calculations and the experiments. We suggest that a very small amount of doping could displace epsilon(F) to produce topologically nontrivial orbits encircling their Dirac node(s).
Identifier: FSU_libsubv1_wos_000433030700009 (IID), 10.1103/PhysRevLett.120.206401 (DOI)
Publication Note: The publisher’s version of record is available at https://doi.org/10.1103/PhysRevLett.120.206401
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000433030700009
Owner Institution: FSU
Is Part Of: Physical Review Letters.
0031-9007
Issue: iss. 20, vol. 120

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Chen, K. -W., Lian, X., Lai, Y., Aryal, N., Chiu, Y. -C., Lan, W., … Balicas, L. (2018). Bulk Fermi Surfaces Of The Dirac Type-ii Semimetallic Candidates Mal3 (where M = V, Nb, And Ta). Physical Review Letters. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000433030700009