Photo-induced dynamics in charge-frustrated systems

Hiroshi Hashimoto, Hiroaki Matsueda, Hitoshi Seo, Sumio Ishihara

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Photo-excited charge dynamics of interacting charge-frustrated systems are studied using a spinless fermion model on an anisotropic triangular lattice. Real-time evolution of the system after irradiating a pump-photon pulse is analyzed by the exact diagonalization method. We focus on photo-excited states in the two canonical charge-ordered (CO) ground states, i.e., horizontal stripe-type and vertical stripe-type COs, which compete with each other owing to the charge frustration. We find that the photo-induced excited states from the two types of COs are distinct. From the horizontal stripe-type CO, a transition to another CO state called the three-fold CO phase occurs. In sharp contrast, the vertical stripe-type CO phase is only weakened by photo-irradiation. Our observations are attributable to the charge frustration effects occurring in the photo-excited states.

Original languageEnglish
Article number123703
Journaljournal of the physical society of japan
Volume83
Issue number12
DOIs
Publication statusPublished - 2014 Dec 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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