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The presence of topological band crossings near the Fermi energy is essentialfor the realization of large anomalous transport properties in the materials.The topological semimetals (TSMs) host such properties owing to their uniquetopological band structure such as Weyl points or nodal lines (NLs), that isprotected by certain symmetries of the crystal. When the NLs break out in thesystem due to perturbation in Hamiltonian, a large Berry curvature arises inthe surrounding area of the gapped NL. In the present work, we studiedanomalous transport properties of Cu2CoSn compound, which has a cubic Heuslercrystal structure (space group: Fm-3m). The Cu2CoSn full Heusler compoundpossesses three NLs in the absence of spin-orbit coupling close to the Fermilevel. These NLs gap out with the consideration of the SOC and a large Berrycurvature observed along the gapped NLs. The integral of Berry curvature givesthe intrinsic anomalous Hall conductivity (AHC) about 1003 S/cm and theanomalous Nernst conductivity (ANC) of about 3.98 A/m-K at the Fermi level.These values of AHC and ANC are comparable to the largest reported values forthe Co2MnGa Heusler compound. Therefore, Cu2CoSn becomes a newborn member ofthe family of full Heusler compounds, which possesses giant AHC and ANC thatcan be useful for the spintronics application.

Colossal anomalous Hall and Nernst effect from the breaking of nodal-line symmetry in Cu2CoSn Weyl semimetal: A first-principles study