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@ARTICLE{Hohenadler:885474,
      author       = {Hohenadler, Martin and Assaad, Fakher F.},
      title        = {{O}rthogonal metal in the {H}ubbard model with liberated
                      slave spins},
      journal      = {Physical review / B},
      volume       = {100},
      number       = {12},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2020-03857},
      pages        = {125133},
      year         = {2019},
      abstract     = {A two-dimensional Falicov-Kimball model, equivalent to the
                      Hubbard model in an unconstrained slave-spin representation,
                      is studied by quantum Monte Carlo simulations. The focus is
                      on a fractionalized metallic phase that is characterized in
                      terms of spectral, thermodynamic, and transport properties,
                      including a comparison to the half-filled Hubbard model. The
                      properties of this phase, most notably a single-particle gap
                      but gapless spin and charge excitations, can in principle be
                      understood in the framework of orthogonal metals. However,
                      important and interesting differences arise in the present
                      setting compared to single-particle mean-field theories and
                      other models. We also discuss the role of the local
                      constraints from the slave-spin representation within an
                      extended phase diagram that includes the spatial dimension
                      as a parameter, thereby making contact with previous work in
                      infinite dimensions. Finally, we highlight the absence of
                      $π$-flux configurations in the slave-spin formulation, in
                      particular in the context of topologically ordered
                      fractional phases predicted at the mean-field level.},
      ddc          = {530},
      pnm          = {899 - ohne Topic (POF4-899) / Numerical simulations of
                      strongly correlated electron systems. $(hwb03_20190501)$},
      pid          = {G:(DE-HGF)POF4-899 / $G:(DE-Juel1)hwb03_20190501$},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1103/PhysRevB.100.125133},
      url          = {https://juser.fz-juelich.de/record/885474},
}