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  Unusual magnetotransport from Si-square nets in topological semimetal HfSiS

Kumar, N., Manna, K., Qi, Y., Wu, S.-C., Wang, L., Yan, B., et al. (2017). Unusual magnetotransport from Si-square nets in topological semimetal HfSiS. Physical Review B, 95(12): 121109, pp. 1-5. doi:10.1103/PhysRevB.95.121109.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-2DD5-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-055B-6
Genre: Journal Article

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 Creators:
Kumar, Nitesh1, Author              
Manna, Kaustuv1, Author              
Qi, Yanpeng1, Author              
Wu, Shu-Chun1, Author              
Wang, Lei1, Author              
Yan, Binghai2, Author              
Felser, Claudia3, Author              
Shekhar, Chandra4, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2Binghai Yan, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863427              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              
4Chandra Shekhar, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863428              

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 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 pi-Berry phase, which is a consequence of topological Dirac-type dispersion of bands originating from the hybridization of p(x) + p(y) and d(x2-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.

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Language(s): eng - English
 Dates: 2017-03-302017-03-30
 Publication Status: Published in print
 Pages: -
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 95 (12) Sequence Number: 121109 Start / End Page: 1 - 5 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008