Journal
PHYSICAL REVIEW B
Volume 97, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.97.155153
Keywords
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Funding
- Japan Society for the Promotion of Science [18K14191]
- National Key R&D Program of China [2016YFA0300600]
- NSF of China [11734003, 11374338, 11774399, 11474330]
- Chinese Academy of Sciences [XDB07020100, QYZDB-SSW-SLH043]
- Grants-in-Aid for Scientific Research [15K05132] Funding Source: KAKEN
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In a Dirac nodal line semimetal, the bulk conduction and valence bands touch at extended lines in the Brillouin zone. To date, most of the theoretically predicted and experimentally discovered nodal lines derive from the bulk bands of two- and three-dimensional materials. Here, based on combined angle-resolved photoemission spectroscopy measurements and first-principles calculations, we report the discovery of node-line-like surface states on the (001) surface of LaBi. Our first-principles calculations show that these surface states become topologically trivial because of band hybridization. Our calculations also reveal that these nodal lines have a tiny gap, which is beyond typical experimental resolution. These results may provide important information to understand the extraordinary physical properties of LaBi, such as the extremely large magnetoresistance and resistivity plateau.
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