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arXiv · 1608.03172

Topological Nodal Line Semimetals in CaP3 family of materials

Qiunan Xu·Rui Yu·Zhong Fang·Xi Dai·Hongming Weng
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Abstract

We propose that CaP3 family of materials, which include CaP3, CaAs3, SrP3, SrAs3 and BaAs3 can host a three-dimensional topological nodal line semimetal states. Based on first-principle calculations and kp model analysis, we show that a closed topological nodal line exists near the Fermi energy, which is protected by the coexistence of time-reversal and spatial inversion symmetry when the band inversion happens. A drumhead-like surface states are also obtained on the c-direction surface of these materials.

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Qiunan Xu, Rui Yu, Zhong Fang, Xi Dai, Hongming Weng. 2016-08-10. Topological Nodal Line Semimetals in CaP3 family of materials. https://doi.org/10.1103/physrevb.95.045136

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