6533b837fe1ef96bd12a258d

RESEARCH PRODUCT

Metal–Metal Distances, Electron Counts, and Superconducting TC's in AM2B2C

Claudia Felser

subject

SuperconductivityCondensed matter physicsChemistryRare earthVan Hove singularityElectronic structureElectronCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsInorganic ChemistryChemical bondCondensed Matter::SuperconductivityMaterials ChemistryCeramics and CompositesMetal metalPhysical and Theoretical ChemistryElectronic band structure

description

Abstract We present first principles band structure calculations on representative boron carbides belonging to the class of superconducting compounds with the general formula AM 2 B 2 C with A =Lu, La, or Th and M =Ni or Pd. The compounds are analyzed within the framework of the so-called van Hove scenario, where superconductivity is linked to certain kinds of instabilities in the band structure. We attempt to determine why the addition of the extra electron on replacing the rare earth with Th does not make a significant difference to the superconducting properties, and why the compound LaNi 2 B 2 C is not superconducting.

yearjournalcountryeditionlanguage
2001-08-01Journal of Solid State Chemistry
https://doi.org/10.1006/jssc.2001.9197