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- W4382490967 abstract "Topological semimetals in BaAl4-type structure have shown many interesting behaviors, such as charge density wave (CDW) in SrAl4 and EuAl4, but not the isostructural and isovalent BaAl4, SrGa4 and BaGa4, although they all host Dirac points and nodal line Dirac-like dispersion. Here using Wannier functions based on density functional theory, we have calculated the susceptibility functions with millions of k-points to reach the small q-vector and study the origin and driving force behind the CDW. Our comparative study reveals that the origin of the CDW in SrAl4 and EuAl4 is the strong electron-phonon coupling interaction for the transverse acoustic mode at small q-vector along the {Gamma}-Z direction besides the maximum of the real part of the susceptibility function from the nested Fermi surfaces of the Dirac-like bands, which explains well the absence of CDW in the other three closely related compounds in a good agreement with experiment." @default.
- W4382490967 created "2023-06-29" @default.
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- W4382490967 date "2023-06-26" @default.
- W4382490967 modified "2023-09-26" @default.
- W4382490967 title "Origin of Charge Density Wave in Topological Semimetals SrAl4 and EuAl4" @default.
- W4382490967 doi "https://doi.org/10.48550/arxiv.2306.15068" @default.
- W4382490967 hasPublicationYear "2023" @default.
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