Lattice softening effects at the Mott critical point of Cr-doped V2O3

  title={Lattice softening effects at the Mott critical point of Cr-doped V2O3},
  author={Sascha Populoh and Pawel Wzietek and R. Gohier and Patricia A. Metcalf},
  journal={Physical Review B},
We have performed sound velocity measurements in (V1-xCrx)(2)O-3 in the vicinity of the critical point of the first-order Mott transition line. The pressure sweeps at constant temperature reveal a large dip in the c(33) compression modulus; this dip sharpens as the critical point is approached. We do not observe signs of criticality on the shear modulus c(44), which is consistent with a transition governed by a scalar order parameter, in accordance with the dynamic mean field theory (DMFT… 
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