Operator Projection Theory for Electron Differentiation in Underdoped Cuprate Superconductors
Abstract
Metals approaching the Mott insulator generate a new hierarchy in the electronic structure accompanied by a momentum dependent electron differentiation, 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 formation of 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-T_c cuprates. Main structures in electronic spectra show a remarkable similarity to numerical results.
Keywords
Cite
@article{arxiv.cond-mat/0108416,
title = {Operator Projection Theory for Electron Differentiation in Underdoped Cuprate Superconductors},
author = {Shigeki Onoda and Masatoshi Imada},
journal= {arXiv preprint arXiv:cond-mat/0108416},
year = {2009}
}
Comments
11 pages, presented at ``Spectroscopies of Novel Superconductors 2001''