Journal
PHYSICAL REVIEW B
Volume 95, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.95.045136
Keywords
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Funding
- National Natural Science Foundation of China [11274359, 11422428, 11674077]
- 973 program of China [2011CBA00108, 2013CB921700]
- Strategic Priority Research Program (B) of the Chinese Academy of Sciences [XDB07020100]
- Fundamental Research Funds for the Central Universities [AUGA5710059415]
- National Thousand Young Talents Program
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By using first-principles calculations and a k . p model analysis, we propose that the three-dimensional topological nodal line semimetal state can be realized in the CaP3 family of materials, which includes CaP3, CaAs3, SrP3, SrAs3, and BaAs3, when spin-orbit coupling (SOC) is ignored. The closed topological nodal line near the Fermi energy is protected by time reversal symmetry and spatial inversion symmetry. Moreover, drumheadlike two-dimensional surface states are also obtained on the c-direction surface of these materials. When SOC is included, the gaps open along the nodal line and these materials become strong topological insulators with Z(2) indices as (1; 010).
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