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Abstract: We investigate the Mott transition in the anisotropic kagom\-e latticeHubbard model using the cellular dynamical mean field theory combined withcontinuous-time quantum Monte Carlo simulations. By calculating the doubleoccupancy and the density of states, we determine the interaction strength ofthe first-order Mott transition and show that it becomes small as theanisotropy increases. We also calculate the spin correlation functions and thesingle-particle spectrum, and reveal that the quasiparticle and magneticproperties change dramatically around the Mott transition; the spincorrelations are strongly enhanced and the quasiparticle bands are deformed. Weconclude that such dramatic changes are due to the enhancement of anisotropyassociated with the relaxation of frustration around the Mott transition.



Author: Yuta Furukawa, Takuma Ohashi, Yohta Koyama, Norio Kawakami

Source: https://arxiv.org/







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