Bandwidth-controlled metal-insulator transition in epitaxial PrNiO 3 ultrathin films induced by dimensional crossover

Enju Sakai; Kohei Yoshimatsu; Masatomo Tamamitsu; Koji Horiba; Atsushi Fujimori; Masaharu Oshima; Hiroshi Kumigashira

doi:10.1063/1.4874980

Bandwidth-controlled metal-insulator transition in epitaxial PrNiO ₃ ultrathin films induced by dimensional crossover

Enju Sakai, Kohei Yoshimatsu, Masatomo Tamamitsu, Koji Horiba, Atsushi Fujimori, Masaharu Oshima, Hiroshi Kumigashira

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The authors have investigated the thickness-dependent physical properties of PrNiO₃ ultrathin films epitaxially grown on LaAlO₃ substrates. The strained PrNiO₃ films exhibit metallic behavior and do not show any indication of temperature-driven metal-insulator transition (MIT) in bulk form, whereas an insulating ground state is realized in a thin limit. In situ photoemission measurements reveal that the observed thickness-dependent MIT is caused by the reduction in bandwidth due to the dimensional control of the films. These results strongly suggest that the MIT in PrNiO₃ films can be controlled by changing the dimensionality under epitaxial constraint.

Original language	English
Article number	171609
Journal	Applied Physics Letters
Volume	104
Issue number	17
DOIs	https://doi.org/10.1063/1.4874980
Publication status	Published - 2014 Apr 28
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Bandwidth-controlled metal-insulator transition in epitaxial PrNiO ₃ ultrathin films induced by dimensional crossover. / Sakai, Enju; Yoshimatsu, Kohei; Tamamitsu, Masatomo; Horiba, Koji; Fujimori, Atsushi; Oshima, Masaharu; Kumigashira, Hiroshi.

In: Applied Physics Letters, Vol. 104, No. 17, 171609, 28.04.2014.

Research output: Contribution to journal › Article › peer-review

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AU - Kumigashira, Hiroshi

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