Journal
SCIENTIFIC REPORTS
Volume 10, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41598-020-69284-5
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Funding
- Air Force office of Scientific Research [FA9550-17-1-0415]
- Center for Thermal Energy Transport under Irradiation, an Energy Frontier Research Center - U.S. DOE, office of Basic Energy Sciences
- NSF IR/D program
- National Science Centre (Poland) [2015/18/A/ST3/00057]
- Foundation for Polish Science (FNP) [START 66.2020]
- U.S. DOE through the LANL LDRD Program [DE-AC52-06NA25396]
- U.S. DOE Office of Science User Facility [DE-AC02-05CH11231]
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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 Gamma 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 Gamma 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. 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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