Non-magnetic impurities as probes of insulating and doped Mott insulators in two dimensions
Abstract
Description
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.
Proceedings of the XIII International Congress on Mathematical Physics, July 2000, London; despite the venue, the article is non-technical and intended for an audience of experimentalists; 8 pages, 2 figures; added references; updated reference
Proceedings of the XIII International Congress on Mathematical Physics, July 2000, London; despite the venue, the article is non-technical and intended for an audience of experimentalists; 8 pages, 2 figures; added references; updated reference