Ultrafast photoinduced transitions in charge density wave, Mott insulator, and metallic phases of an iodine-bridged platinum compound

K. Kimura, H. Matsuzaki, S. Takaishi, M. Yamashita, and H. Okamoto

Phys. Rev. B 79, 075116 – Published 18 February 2009

Abstract

Ultrafast photoinduced transitions among three phases—charge density wave (CDW), Mott-Hubbard insulator, and metal—were investigated in an iodine (I)-bridged platinum (Pt) compound by femtosecond reflection spectroscopy. For a weak photoexcitation, CDW phase over 70 Pt sites is converted to Mott-Hubbard phase by one photon. Such large conversion efficiency makes possible the complete and transient transition from CDW to Mott-Hubbard phase. For a strong excitation, the low-energy spectral weight is increased, suggesting a conversion to a metallic state.

Received 27 November 2008

DOI:https://doi.org/10.1103/PhysRevB.79.075116

Authors & Affiliations

K. Kimura¹, H. Matsuzaki¹, S. Takaishi², M. Yamashita², and H. Okamoto^1,3,*

¹Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
²Department of Chemistry, Tohoku University, Sendai 980-8578, Japan
³CREST, JST, Kawaguchi, Saitama 332-0012, Japan

^*Corresponding author; okamotoh@k.u-tokyo.ac.jp

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Issue

Vol. 79, Iss. 7 — 15 February 2009

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Physical Review B

covering condensed matter and materials physics