Variational Monte Carlo Study of Electron Differentiation around Mott Transition

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dc.creatorTahara, Daisuke
dc.creatorImada, Masatoshi
dc.date2008-07-08
dc.date.accessioned2026-07-07T09:59:12Z
dc.date.available2026-07-07T09:59:12Z
dc.descriptionWe study ground-state properties of the two-dimensional Hubbard model at half filling by improving variational Monte Carlo method and by implementing quantum-number projection and multi-variable optimization. The improved variational wave function enables a highly accurate description of the Mott transition and strong fluctuations in metals. We clarify how anomalous metals appear near the first-order Mott transition. The double occupancy stays nearly constant as a function of the on-site Coulomb interaction in the metallic phase near the Mott transition in agreement with the previous unbiased results. This unconventional metal at half filling is stabilized by a formation of ``electron-like pockets'' coexisting with an arc structure, which leads to a prominent differentiation of electrons in momentum space. An abrupt collapse of the ``pocket'' and ``arc'' drives the first-order Mott transition.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0807.1303
dc.identifierhttp://arxiv.org/abs/0807.1303
dc.identifierJ. Phys. Soc. Jpn. 77 (2008) 093703
dc.identifierdoi:10.1143/JPSJ.77.093703
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/167942
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleVariational Monte Carlo Study of Electron Differentiation around Mott Transition
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