Effects of Conduction Electron Correlation on Heavy-Fermion Systems
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概要
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We study the effects of Hubbard-type electron correlation on the periodic Anderson model. From the analysis based on dynamical mean field theory and continuous-time quantum Monte Carlo method, we obtain the high-precision phase diagrams where a crossover within the magnetically ordered phase as well as another intriguing crossover between the Mott and Kondo insulating phases are observed with increasing c--f hybridization. We further address the effects of c--f Coulomb repulsion and elucidate that the charge-density-wave (CDW) phase with alternating c- and f-rich sites is stabilized in the strong correlation region. The above conclusions are drawn via the extensive calculations of the order parameter, the double occupancy, the spin correlation function and the spectral function.
- 2011-06-15
著者
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Kawakami Norio
Department Of Applied Physics Osaka University
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Ohashi Takuma
Department Of Applied Physics Osaka University
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Kawakami Norio
Department of Physics, Kyoto University, Kyoto 606-8502, Japan
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Yoshida Tsuneya
Department of Physics, Kyoto University, Kyoto 606-8502, Japan
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