Photo-Induced Dynamics in Charge-Frustrated Systems
作者： Hiroshi Hashimoto , Hiroaki Matsueda , Hitoshi Seo , Sumio Ishihara
关键词: Excited state 、 Frustration 、 Pulse (physics) 、 Anisotropy 、 Fermion 、 Charge (physics) 、 Phase (matter) 、 Hexagonal lattice 、 Condensed matter physics 、 Physics
摘要: Photo-excited charge dynamics of interacting charge-frustrated systems are studied using a spinless fermion model on an anisotropic triangular lattice. Real-time evolution the system after irradiating pump-photon pulse is analyzed by exact diagonalization method. We focus photo-excited states in two canonical charge-ordered (CO) ground states, i.e., horizontal stripe-type and vertical COs, which compete with each other owing to frustration. find that photo-induced excited from types COs distinct. From CO, transition another CO state called three-fold phase occurs. In sharp contrast, only weakened photo-irradiation. Our observations attributable frustration effects occurring states.
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