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Photoemission evidence for crossover from Peierls-like to Mott-like transition in highly strained VO₂

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arxiv 1211.3943 v1 pith:CKAUFKJV submitted 2012-11-16 cond-mat.str-el cond-mat.mes-hall

Photoemission evidence for crossover from Peierls-like to Mott-like transition in highly strained VO$_2$

J. Laverock , A. R. H. Preston , D. Newby Jr , K. E. Smith , S. Sallis , L. F. J. Piper , S. Kittiwatanakul , J. W. Lu
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S. A. Wolf M. Leandersson T. Balasubramanian
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classification cond-mat.str-el cond-mat.mes-hall
keywords strainedtransitioncrossovermott-likeapplicationcomparisondemonstratesdimerization
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abstract

We present a spectroscopic study that reveals that the metal-insulator transition of strained VO$_2$ thin films may be driven towards a purely electronic transition, which does not rely on the Peierls dimerization, by the application of mechanical strain. Comparison with a moderately strained system, which does involve the lattice, demonstrates the crossover from Peierls- to Mott-like transitions.

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