Operator projection theory for electron differentiation in underdoped cuprate superconductors

Shigeki Onoda, Masatoshi Imada*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)


Metals approaching the Mott insulator generate a new hierarchy in the electronic structure accompanied by an electron differentiation with emergence of strongly momentum dependent structure, beyond the Mott-Hubbard, Brinkman-Rice and Slater pictures of the Mott transition. To consider such nonlinear phenomenon, we develop an analytic nonperturbative theory based on operator projections combined with a self-consistent treatment of the low-energy excitations. This reproduces the Hubbard bands, Mott gap, spin fluctuations, mass divergence, diverging charge compressibility, and strongly renormalized flat and damped dispersion similar to angle-resolved photoemission data in high-Tc cuprates. Electronic spectra show a remarkable similarity to numerical results.

Original languageEnglish
Pages (from-to)2225-2231
Number of pages7
JournalJournal of Physics and Chemistry of Solids
Issue number12
Publication statusPublished - 2002 Dec
Externally publishedYes
EventSNS 2001 - Chicago, IL, United States
Duration: 2001 May 132002 May 17


  • High-T cuprate superconductors
  • Metal-insulator transition
  • Projection operator

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics


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