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@ARTICLE{Ishida:22345,
      author       = {Ishida, H. and Liebsch, A.},
      title        = {{F}irst-order metal-to-metal phase transition and
                      non-{F}ermi-liquid behavior in a two-dimensional {M}ott
                      insulating layer adsorbed on a metal surface},
      journal      = {Physical review / B},
      volume       = {85},
      number       = {4},
      issn         = {1098-0121},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PreJuSER-22345},
      pages        = {045112},
      year         = {2012},
      note         = {H.I. thanks the Alexander von Humboldt Foundation for
                      support during his stay in Germany. The work of H. I. was
                      supported by a Grant-in-Aid for Scientific Research (No.
                      20540191) from the Japan Society for the Promotion of
                      Science.},
      abstract     = {The electronic structure of a two-dimensional Mott
                      insulating layer in contact with a semi-infinite metal
                      substrate is studied within cluster dynamical mean field
                      theory. For this purpose, the overlayer forming a square
                      lattice is divided into an array of (2 x 2)-site clusters in
                      which interatomic electron correlations are taken into
                      account explicitly. In striking contrast to the single-site
                      approximation, where substrate-adsorbate hybridization gives
                      rise to Fermi-liquid properties at low temperature,
                      short-range correlations lead to bad metallicity in a much
                      wider parameter range as a function of temperature and
                      overlayer-substrate coupling strength. The (pi,0) component
                      of the self-energy exhibits a finite low-energy scattering
                      rate, which increases with decreasing temperature even when
                      hybridization between overlayer and substrate states is as
                      large as the nearest-neighbor hopping energy within the
                      overlayer. In addition, at moderate overlayer-substrate
                      coupling and in the presence of the second nearest-neighbor
                      hopping interaction, the overlayer undergoes a first-order
                      phase transition between two correlated metallic phases when
                      electron doping is increased by changing the chemical
                      potential. These results suggest that normal metal proximity
                      effects are strongly modified when spatial fluctuations in
                      the overlayer are taken into consideration.},
      keywords     = {J (WoSType)},
      cin          = {IAS-1 / PGI-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106},
      pnm          = {Grundlagen für zukünftige Informationstechnologien},
      pid          = {G:(DE-Juel1)FUEK412},
      shelfmark    = {Physics, Condensed Matter},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000299118000004},
      doi          = {10.1103/PhysRevB.85.045112},
      url          = {https://juser.fz-juelich.de/record/22345},
}