Breakdown of Strong-Coupling Perturbation Theory in Doped Mott Insulators

Abstract

We show that doped Mott insulators, such as the copper-oxide superconductors, are asymptotically slaved in that the quasiparticle weight, $Z$, near half-filling depends critically on the existence of the high energy scale set by the upper Hubbard band. In particular, near half filling, the following dichotomy arises: $Z\ne 0$ when the high energy scale is integrated out but Z=0 in the thermodynamic limit when it is retained. Slavery to the high energy scale arises from quantum interference between electronic excitations across the Mott gap. Broad spectral features seen in photoemission in the normal state of the cuprates are argued to arise from high energy slavery.

Published version

References in corpus (3)

• Gossamer Superconductor, Mott Insulator, and Resonating Valence Bond State in Correlated Electron Systems
• Pseudogap in Doped Mott Insulators is the Near-neighbour Analogue of the Mott Gap
• The Full Mottness

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• Origin of the Mott Gap
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• Temperature dependence of the spectral weight in p- and n-type cuprates: a study of normal state partial gaps and electronic kinetic energy
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• Non-conservation of Fermionic Degrees of Freedom at Low-energy in Doped Mott Insulators
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