Electronic structure of the superconducting layered ternary nitrides CaTaN2 and CaNbN2

Authors
Oliva, JM Weht, R Ordejon, P Canadell, E
Citation
Jm. Oliva et al., Electronic structure of the superconducting layered ternary nitrides CaTaN2 and CaNbN2, PHYS REV B, 62(3), 2000, pp. 1512-1515
Citations number
28
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
62
Issue
3
Year of publication
2000
Pages
1512 - 1515
Database
ISI
SICI code
0163-1829(20000715)62:3<1512:ESOTSL>2.0.ZU;2-2
Abstract
The electronic structure of the layered ternary nitrides CaMN2 (M = Ta, Nb) has been studied and the results are compared with those for the related L iMoN2 phase. It is shown that the former are two-dimensional metals, with a Fermi surface very similar to that of the 1T-TaX2 (X = S, Se) dichalcogeni des, whereas the latter is a three-dimensional metal. The three phases show strong covalent bonding within the layers but ionic bonding with the alkal i atom sheets.