ZhETF, Vol. 132,
No. 3,
p. 731 (September 2007)
(English translation - JETP,
Vol. 105, No. 3,
p. 642,
September 2007
available online at www.springer.com
)
{\it AB INITIO} CALCULATIONS OF THE PHYSICAL PROPERTIES OF TRANSITION METAL CARBIDES AND NITRIDES AND POSSIBLE ROUTES TO HIGH-Tc SUPERCONDUCTIVITY
Maksimov E.G., Ebert S.V., Magnitskaya M.V., Karakozov A.E.
Received: March 6, 2007
PACS: 74.70.Ad, 63.20.Dj, 63.20.Kr
Ab initio linear-response calculations are reported of the phonon spectra and the electron-phonon interaction for several transition metal carbides and nitrides in a NaCl-type structure. For NbC, the kinetic, optical, and superconducting properties are calculated in detail at various pressures and the normal-pressure results are found to agree well with the experiment. Factors accounting for the relatively low critical temperatures Tc in transition metal compounds with light elements are considered and the possible ways of increasing Tc are discussed.
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