Photoinduced phase transition in charge order systems-charge frustration and interplay with lattice

Hiroshi Hashimoto, Hiroaki Matsueda, Hitoshi Seo, Sumio Ishihara

研究成果: ジャーナルへの寄稿学術論文査読

8 被引用数 (Scopus)

抄録

Lattice effects on photoexcited states in an interacting charge-frustrated system are examined. Real-time dynamics in the interacting spinless fermion model on a triangular lattice coupled to lattice vibration are analyzed by applying the exact diagonalization method combined with the classical equation of motion. A photoinduced phase transition from the horizontal stripe-type charge order (CO) to the 3-fold CO occurs through a characteristic intermediate time domain. By analyzing the time evolution in detail, we find that these characteristic dynamics are seen when the electron and lattice sectors are not complementary to each other but show cooperative time evolutions. The dynamics are distinct from those from the vertical stripe-type CO, in which a monotonic CO melting occurs. A scenario of the photoinduced CO phase transition with lattice degree of freedom is presented from the viewpoint of charge frustration.

本文言語英語
論文番号113702
ジャーナルJournal of the Physical Society of Japan
84
11
DOI
出版ステータス出版済み - 2015 11月 15

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