Electron correlations in the Hubbard mod
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Akihisa Koga; Takuya Yoshioka; Norio Kawakami; Hisatoshi Yokoyama
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Article
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2007
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Elsevier Science
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English
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We investigate the two-dimensional Hubbard model on the planar pyrochlore lattice at half filling. By means of variational Monte Carlo simulations including nearest neighbor doublon-holon correlations as well as onsite correlations, we discuss how the semi-metallic state is stabilized at zero temper