Myriad phases of the Checkerboard Hubbard Model

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The zero-temperature phase diagram of the checkerboard Hubbard model is obtained in the solvable limit in which it consists of weakly coupled square plaquettes. As a function of the on-site Coulomb repulsion U and the density of holes per site, x, we demonstrate the existence of at least 16 distinct phases. For instance, at zero doping, the ground state is a novel d-wave Mott insulator (d-Mott), which is not adiabatically continuable to a band insulator; by doping the d-Mott state with holes, depending on the magnitude of U, it gives way to a d-wave superconducting state, a two-flavor spin-1/2 Fermi ... continued below

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Yao, Hong April 6, 2010.

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The zero-temperature phase diagram of the checkerboard Hubbard model is obtained in the solvable limit in which it consists of weakly coupled square plaquettes. As a function of the on-site Coulomb repulsion U and the density of holes per site, x, we demonstrate the existence of at least 16 distinct phases. For instance, at zero doping, the ground state is a novel d-wave Mott insulator (d-Mott), which is not adiabatically continuable to a band insulator; by doping the d-Mott state with holes, depending on the magnitude of U, it gives way to a d-wave superconducting state, a two-flavor spin-1/2 Fermi liquid (FL), or a spin-3/2 FL.

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  • Journal Name: Submitted to Physical Review B

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  • Report No.: SLAC-PUB-13982
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 975030
  • Archival Resource Key: ark:/67531/metadc927274

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  • April 6, 2010

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  • Nov. 13, 2016, 7:26 p.m.

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  • Feb. 17, 2017, 6:35 p.m.

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Yao, Hong. Myriad phases of the Checkerboard Hubbard Model, article, April 6, 2010; United States. (digital.library.unt.edu/ark:/67531/metadc927274/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.