Multiple topological states in LaAgAs2, a failed square-net semimetal
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36 MATERIALS SCIENCE↗
Engineering topics
Wu, Xueliang
Publications and source records attributed to Wu, Xueliang.
Coexistence of Dirac fermion and charge density wave in the square-net-based semimetal LaAuSb 2
Here, we report a comprehensive study of magnetotransport properties, angle-resolved photoemission spectroscopy (ARPES), and density functional theory (DFT) calculations on self-flux grown LaAuSb 2 single crystals. Resistivity and Hall measurements reveal a charge density wave (CDW) transition at 77 K. MR and de Haas-Van Alphen (dHvA) measurements indicate that the transport properties of LaAuSb 2 are dominated by Dirac fermions that arise from Sb square nets. ARPES measurements and DFT calculations reveal an electronic structure with a common feature of the square-net-based topological semimetals, which is in good agreement with the magnetotransport properties. Our results indicate the coexistence of CDW and Dirac fermion in LaAuSb 2 , both of which are linked to the bands arising from the Sb-square net, suggesting that the square net could serve as a structural motif to explore various electronic orders.
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗