Electronic Specific Heat of Metallic Ti-DopedV2O3

Abstract

In the system (${({\mathrm{V}}_{1\ensuremath{-}x}{\mathrm{Ti}}_{x})}_{2}{\mathrm{O}}_{3}$, the antiferromagnetic insulating phase is suppressed for $x>0.05$. The linear term in the heat capacity is very large ($\ensuremath{\gamma}=192\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ cal \ifmmode^\circ\else\textdegree\fi{}${\mathrm{K}}^{\ensuremath{-}2}$ per mole of ${\mathrm{V}}_{2}$${\mathrm{O}}_{3}$), and the magnetic susceptibility at 4.2\ifmmode^\circ\else\textdegree\fi{}K is 2 \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}3}$ emu ${\mathrm{mole}}^{\ensuremath{-}1}$ giving a value $\frac{\ensuremath{\chi}}{\ensuremath{\gamma}}=1.8$. The results are interpreted as evidence for a strongly correlated metallic phase.