Dimensional-crossover-driven metal-insulator transition in SrVO3 ultrathin films

K. Yoshimatsu, T. Okabe, H. Kumigashira, S. Okamoto, S. Aizaki, A. Fujimori, M. Oshima

研究成果: ジャーナルへの寄稿学術論文査読

166 被引用数 (Scopus)

抄録

We have investigated the changes occurring in the electronic structure of digitally controlled SrVO3 ultrathin films across the metal-insulator transition (MIT) by the film thickness using in situ photoemission spectroscopy. With decreasing film thickness, a pseudogap is formed at EF through spectral weight transfer from the coherent part to the incoherent part. The pseudogap finally evolves into an energy gap that is indicative of the MIT in a SrVO3 ultrathin film. The observed spectral behavior is reproduced by layer dynamical-mean- field-theory calculations, and it indicates that the observed MIT is caused by the reduction in the bandwidth due to the dimensional crossover.

本文言語英語
論文番号147601
ジャーナルPhysical Review Letters
104
14
DOI
出版ステータス出版済み - 2010 4月 9

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