Operator Projection Theory for Electron Differentiation in Underdoped Cuprate Superconductors

Details Operator Projection Theory for Electron Differentiation in Underdoped Cuprate Superconductors Operator Projection Theory for Electron Differentiation in Underdoped Cuprate Superconductors

2001-08-27

arxiv.org/abs/cond-mat/0108416v1

J. Phys. Chem. Solid 63 (2002) 2225.

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, presented at ``Spectroscopies of Novel Superconductors 2001''

Scientific paper

10.1016/S0022-3697(02)00248-2

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.

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