Abstract

Recent ARPES measurements on the electron-doped cuprate Nd₂₋ₓCeₓCuO₄ can be interpreted in a mean field model of uniform doping of an antiferromagnet, with the Mott gap closing near optimal doping. Mode coupling calculations confirm the mean field results, while clarifying the relation between the Mott gap and shortrange magnetic order. The same calculations find that hole doped cuprates should follow a strikingly different doping dependence, involving instability toward spiral phases or stripes. Nevertheless, the magnetic order (now associated with stripes) again collapses near optimal doping.

Notes

Originally posted at http://arxiv.org/abs/cond-mat/0308361v1. Preprint of an article published in Intrinsic Multiscale Structure and Dynamics in Complex Electronic Oxides: Proceedings of the Workshop, 2003.

Keywords

Mott gap, hole doped cuprates, Nd₂₋ₓCeₓCuO₄, mean field models

Subject Categories

Superconductivity, Antiferromagnetism

Disciplines

Physics

Publication Date

2003

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