Controlling the Superconductivity of Nb₂Pd_xS₅ via Reversible Li Intercalation.

ABSTRACT: The Nb₂Pd_xS₅ (x ≈ 0.74) superconductor with a T_c of 6.5 K is reduced by the intercalation of lithium in ammonia solution or electrochemically to produce an intercalated phase with expanded lattice parameters. The structure expands by 2% in volume and maintains the C2/m symmetry and rigidity due to the PdS₄ units linking the layers. Experimental and computational analysis of the chemically synthesized bulk sample shows that Li occupies triangular prismatic sites between the layers with an occupancy of 0.33(4). This level of intercalation suppresses the superconductivity, with the injection of electrons into the metallic system observed to also reduce the Pauli paramagnetism by ∼40% as the bands are fil

SUBMITTER: Elgaml M 

PROVIDER: S-EPMC10792603 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature