Observation of Dirac state in half-Heusler material YPtBi

Hosen, M. Mofazzel; Dhakal, Gyanendra; Dimitri, Klauss; Choi, Hongchul; Kabir, Firoza; Sims, Christopher; Pavlosiuk, Orest; Wiśniewski, Piotr; Durakiewicz, Tomasz; Zhu, Jian-Xin; Kaczorowski, Dariusz; Neupane, Madhab

doi:10.1038/s41598-020-69284-5

Title: Observation of Dirac state in half-Heusler material YPtBi

Journal Article · Thu Jul 23 00:00:00 EDT 2020 · Scientific Reports

DOI:https://doi.org/10.1038/s41598-020-69284-5· OSTI ID:1642318

Hosen, M. Mofazzel; Dhakal, Gyanendra; Dimitri, Klauss; Choi, Hongchul; Kabir, Firoza; Sims, Christopher; Pavlosiuk, Orest; Wiśniewski, Piotr; Durakiewicz, Tomasz; Zhu, Jian-Xin; Kaczorowski, Dariusz; Neupane, Madhab

The prediction of non-trivial topological electronic states in half-Heusler compounds makes these materials good candidates for discovering new physics and devices as half-Heusler phases harbour a variety of electronic ground states, including superconductivity, antiferromagnetism, and heavy-fermion behaviour. Here, we report a systematic studies of electronic properties of a superconducting half-Heusler compound YPtBi, in its normal state, investigated using angle-resolved photoemission spectroscopy. Our data reveal the presence of a Dirac state at the Γ point of the Brillouin zone at 500 meV below the Fermi level. We observe the presence of multiple Fermi surface pockets, including two concentric hexagonal and six half-oval shaped pockets at the Γ and K points of the Brillouin zone, respectively. Furthermore, our measurements show Rashba-split bands and multiple surface states crossing the Fermi level, this is also supported by the first-principles calculations. Finally, our findings of a Dirac state in YPtBi contribute to the establishing of half-Heusler compounds as a potential platform for novel topological phases.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC). Basic Energy Sciences (BES); National Science Centre; Foundation for Polish Science (FNP)

Grant/Contract Number:: AC52-06NA25396; 2015/18/A/ST3/00057; 89233218CNA000001; AC02-05CH11231; 5/18/A/ST3/00057

OSTI ID:: 1642318

Alternate ID(s):: OSTI ID: 1726156

Report Number(s):: LA-UR-17-29005; 12343; PII: 69284

Journal Information:: Scientific Reports, Journal Name: Scientific Reports Vol. 10 Journal Issue: 1; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Cited by: 11 works

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