Journal
NATURE COMMUNICATIONS
Volume 7, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms13315
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Funding
- University of Central Florida
- LANL LDRD Program
- NSF IR/D program
- National Science Centre (Poland) [2015/18/A/ST3/00057]
- Center for Integrated Nanotechnologies
- U.S. DOE Office of Basic Energy Sciences
- LANL Institutional Computing Program for computational resources
- Office of Basic Energy Sciences, US Department of Energy (DOE) [DE-FG-02-40105ER46200]
- DOE, Office of Science, Basic Energy Sciences [DE-FG02-07ER46352]
- NERSC supercomputing center through DOE [DE-AC02-05CH11231]
- Singapore National Research Foundation under NRF [NRF-NRFF2013-03]
- National Science Council, Taiwan
- Grants-in-Aid for Scientific Research [16K13823] Funding Source: KAKEN
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Recently, noncentrosymmetric superconductor BiPd has attracted considerable research interest due to the possibility of hosting topological superconductivity. Here we report a systematic high-resolution angle-resolved photoemission spectroscopy (ARPES) and spin-resolved ARPES study of the normal state electronic and spin properties of BiPd. Our experimental results show the presence of a surface state at higher-binding energy with the location of Dirac point at around 700 meV below the Fermi level. The detailed photon energy, temperature-dependent and spin-resolved ARPES measurements complemented by our first-principles calculations demonstrate the existence of the spin-polarized surface states at high-binding energy. The absence of such spin-polarized surface states near the Fermi level negates the possibility of a topological superconducting behaviour on the surface. Our direct experimental observation of spin-polarized surface states in BiPd provides critical information that will guide the future search for topological superconductivity in noncentrosymmetric materials.
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