Critical Behavior of Metal-Insulator Transition in ${\mathrm{La}}_{1-\mathit{x}}{\mathrm{Sr}}_{\mathit{x}}{\mathrm{VO}}_3$

Critical behavior of the metal-insulator transition (MIT) coupled with spin/orbital correlations has been investigated for single crystals of ${\mathrm{La}}_{1-x}{\mathrm{Sr}}_x{\mathrm{VO}}_3$. In the paramagnetic (PM) metal phase $(x>\mathrm{}0.260\mathrm{})$, the precursor to the MIT manifests itself as an enhancement of carrier effective mass. In the antiferromagnetic (AF) metal phase $\left(0.178\le x\le 0.260\right)$, the carrier density decreases and the correlation of the orbital seems to evolve towards the MIT $(x=0.178\mathrm{})$. In the AF insulating phase $(x<\mathrm{}0.178\mathrm{})$, the distinct first-order structural phase transition occurs with the decrease of temperature, perhaps concomitantly with the orbital ordering.