Abstract
The superconducting properties of the lanthanide LnNi2B2C phases are attributed to an electron-phonon mechanism in which high frequency boron a1g optical phonons dynamically modulate the tetrahedral NiB4 bond angles. We identify a key energy-band feature within the NiBC s-p manifold whose position relative to EF is particularly sensitive to the NiB4 tetrahedral geometry and which exhibits strong electron-phonon coupling. Favorable superconducting properties are expected for compounds where the NiB4 tetrahedra are nearly "ideal" since this happens to optimize the alignment of this special s-p band with the Fermi level.
Original language | English (US) |
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Pages (from-to) | 587-590 |
Number of pages | 4 |
Journal | Solid State Communications |
Volume | 91 |
Issue number | 8 |
DOIs | |
State | Published - Aug 1994 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Chemistry
- Condensed Matter Physics
- Materials Chemistry
Keywords
- A. superconductors
- D. electronic band structure
- D. phonons