Gate-Induced Mott Transition

Details Gate-Induced Mott Transition Gate-Induced Mott Transition

2003-05-28

arxiv.org/abs/cond-mat/0305632v3

New J. Phys. 6 (2004) 52

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 eps figures

Scientific paper

For a strongly correlated material, VO2, near a critical on-site Coulomb energy U/Uc=1, the abrupt Mott metal-insulator transition (MIT) rather than the continuous Hubbard MIT is observed by inducing internal optical phonon-coupled holes (hole inducing of 0.018%) into conduction band, with a gate field of fabricated transistors. Observed gate effects, change of the MIT drain-source voltage caused by a gate field, are the effect of measurement due to inhomogeneity of channel material and is an average over the measurement region of the true gate effect based on the large conductivity (or effective mass) near the MIT predicted by the Brinkman-Rice picture. A discontinuous gate effect such as digital is observed, which is a characteristic of the transistor and a possible condition of a very high-speed switching transistor.

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