2000/09/30 by Subir Sachdev, Matthias Vojta · 1 citation
Physics and Astronomy · #cond-mat.str-el #cond-mat.supr-con
published as A. Fokas, A. Grigoryan, T. Kibble, and B. Zegarlinski eds, International Press, Boston (2001) · 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
arxiv created 2000/11/02 · arxiv updated 2009/11/30
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.