6533b7d6fe1ef96bd1265a52
RESEARCH PRODUCT
Structure and superconductivity in LnNi2B2C: comparison of calculation and experiment
Claudia FelserC. KealhoferSergio Paulo Martins LoureiroRobert J. Cavasubject
SuperconductivityLanthanideCondensed matter physicsIntermetallicchemistry.chemical_elementFermi energyGeneral ChemistryCondensed Matter PhysicsCondensed Matter::Materials ScienceNickelMolecular geometryTight bindingchemistryCondensed Matter::SuperconductivityMaterials ChemistryTetrahedronCondensed Matter::Strongly Correlated Electronsdescription
Abstract The experimental relation between the superconducting transition temperature ( T c ) and lattice size for the lanthanide nickel borocarbides is clarified. The electronic density of states (DOS) at the Fermi energy is calculated by the LMTO method for selected non-magnetic lanthanides. The T c and the DOS are both shown to scale in the same way with a structural parameter that characterizes the bond angle in the NiB 4 tetrahedra. The results strongly support arguments that the suppression of superconductivity on going from smaller to larger lanthanides in the quaternary nickel borocarbides is structurally driven. A structure– T c relationship of this type is unusual for intermetallic superconductors.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-09-01 | Solid State Communications |