Low temperature specific heat of vanadium carbide
1970; Taylor & Francis; Volume: 21; Issue: 170 Linguagem: Inglês
10.1080/14786437008238413
ISSN0031-8086
AutoresD. H. Lowndes, Leonard Finegold, R. G. Lye,
Tópico(s)Semiconductor materials and interfaces
ResumoAbstract The specific heat has been measured at low temperatures (∼ 1°K to 20°K) for four large crystals of VCx, with results that indicate the presence of maxima near x=0.85 in both the Debye characteristic temperature, θ0, and the electronic density of states at the Fermi level N γ(ζ). The behaviour of θ 0 suggests that the maximum melting temperature of VCx occurs at a composition close to that of the ordered compound V6C5, rather than at the composition VC0.75 proposed recently by Rudy. The variation of N γ (ζ) with x has been used to obtain an estimate for the density-of-states curve in the vicinity of the Fermi level. The result is discussed in terms of the behaviour expected from elementary considerations of the electronic structure.
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