Monoclinic and correlated metal phase in VO(2) as evidence of the Mott transition: coherent phonon analysis.

@article{Kim2006MonoclinicAC,
  title={Monoclinic and correlated metal phase in VO(2) as evidence of the Mott transition: coherent phonon analysis.},
  author={H. R. Kim and Yong Wook Lee and B. Kim and Byung-Gyu Chae and Sun Jin Yun and K Kang and Kang-jeon Han and Ki-Ju Yee and Yong-sik Lim},
  journal={Physical review letters},
  year={2006},
  volume={97 26},
  pages={266401}
}
In femtosecond pump-probe measurements, the appearance of coherent phonon oscillations at 4.5 and 6.0 THz indicating the rutile metal phase of VO2 does not occur simultaneously with the first-order metal-insulator transition (MIT) near 68 degrees C. The monoclinic and correlated metal (MCM) phase between the MIT and the structural phase transition (SPT) is generated by a photoassisted hole excitation, which is evidence of the Mott transition. The SPT between the MCM phase and the rutile metal… CONTINUE READING
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