Unusual magnetotransport from Si-square nets in topological semimetal HfSiS

Kumar N, Manna K, Qi Y, Wu SC, Wang L, Yan B, Felser C, Shekhar C (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Physical Review B American Physical Society

Book Volume: 95

Article Number: 121109

Journal Issue: 12

DOI: 10.1103/PhysRevB.95.121109

Abstract

The class of topological semimetals comprises a large pool of compounds. Together they provide a wide platform to realize exotic quasiparticles, for example, Dirac, nodal-line Dirac, and Weyl fermions. In this Rapid Communication, we report the Berry phase, Fermi-surface topology, and anisotropic magnetoresistance of HfSiS which has recently been predicted to be a nodal-line semimetal. This compound contains a large carrier density, higher than most of the known semimetals. Massive amplitudes of de Haas-van Alphen and Shubnikov-de Haas oscillations up to 20 K in 7 T assist us in witnessing a nontrivial π-Berry phase, which is a consequence of topological Dirac-type dispersion of bands originating from the hybridization of px+py and dx2-y2 orbitals of square-net plane of Si and Hf atoms, respectively. Furthermore, we establish the three-dimensional Fermi surface which consists of very asymmetric water caltroplike electrons and barley seedlike hole pockets which account for the anisotropic magnetoresistance in HfSiS.

Involved external institutions

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE)

How to cite

APA:

Kumar, N., Manna, K., Qi, Y., Wu, S.-C., Wang, L., Yan, B.,... Shekhar, C. (2017). Unusual magnetotransport from Si-square nets in topological semimetal HfSiS. Physical Review B, 95(12). https://doi.org/10.1103/PhysRevB.95.121109

MLA:

Kumar, Nitesh, et al. "Unusual magnetotransport from Si-square nets in topological semimetal HfSiS." Physical Review B 95.12 (2017).

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