Overscreening in Hubbard electron systems

H. -B. Schüttler, C. Gröber, H. G. Evertz, W. Hanke

Research output: Working paperPreprint


We show that doping-induced charge fluctuations in strongly correlated Hubbard electron systems near the 1/2-filled, insulating limit cause overscreening of the electron-electron Coulomb repulsion. The resulting attractive screened interaction potential supports d_{x^2-y^2}-pairing with a strongly peaked, doping dependent pairing strength at lower doping, followed by s-wave pairing at larger doping levels.
Original languageEnglish
Publication statusPublished - 12 May 1998

Publication series

NamearXiv.org e-Print archive
PublisherCornell University Library


  • cond-mat.supr-con
  • cond-mat.str-el


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