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Superconductivity in Disordered and Ordered Niobium Carbide
Author(s) -
Gusev A. I.,
Rempel A. A.
Publication year - 1989
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221510125
Subject(s) - niobium carbide , niobium , superconductivity , carbide , materials science , condensed matter physics , crystallography , metallurgy , chemistry , physics
The magnetic susceptibility, low‐temperature heat capacity, and superconducting transition temperature of an ordered and disordered niobium carbide are investigated. Features peculiar to the electronic structure of a nonstoichiometric niobium carbide are discussed. To explain the superconductive properties of the niobium carbide, a quasi‐two‐dimensional model is proposed which takes into account the peculiarities in the crystal structure of this compound. It is suggested that an exciton mechanism of superconductivity is possible which may be due to the layered structure of the niobium carbide.