  The presence of topological band crossings near the Fermi energy is essential
for the realization of large anomalous transport properties in the materials.
The topological semimetals (TSMs) host such properties owing to their unique
topological band structure such as Weyl points or nodal lines (NLs), that is
protected by certain symmetries of the crystal. When the NLs break out in the
system due to perturbation in Hamiltonian, a large Berry curvature arises in
the surrounding area of the gapped NL. In the present work, we studied
anomalous transport properties of Cu2CoSn compound, which has a cubic Heusler
crystal structure (space group: Fm-3m). The Cu2CoSn full Heusler compound
possesses three NLs in the absence of spin-orbit coupling close to the Fermi
level. These NLs gap out with the consideration of the SOC and a large Berry
curvature observed along the gapped NLs. The integral of Berry curvature gives
the intrinsic anomalous Hall conductivity (AHC) about 1003 S/cm and the
anomalous 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 for
the Co2MnGa Heusler compound. Therefore, Cu2CoSn becomes a newborn member of
the family of full Heusler compounds, which possesses giant AHC and ANC that
can be useful for the spintronics application.
