Non-magnetic impurities as probes of insulating and doped Mott insulators in two dimensions

Details Non-magnetic impurities as probes of insulating and doped Mott insulators in two dimensions Non-magnetic impurities as probes of insulating and doped Mott insulators in two dimensions

2000-09-14

arxiv.org/abs/cond-mat/0009202v3

A. Fokas, A. Grigoryan, T. Kibble, and B. Zegarlinski eds, International Press, Boston (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

Proceedings of the XIII International Congress on Mathematical Physics, July 2000, London; despite the venue, the article is n

Scientific paper

We characterize paramagnetic Mott insulators by their response to static, non-magnetic impurities. States with spinon deconfinement (or spin-charge separation) are distinguished from those with spinon confinement by distinct impurity susceptibilities and finite-size spectra. We discuss the evolution of physical properties upon doping to a d-wave superconductor, and argue that a number of recent experiments favor spinon confinement in the reference Mott insulating state.

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