2001/08/26 by Subir Sachdev
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Topological Materials and Phenomena #cond-mat.str-el
paper · pdf · doi:10.1016/s0022-3697(02)00245-7
published as Journal of Physics and Chemistry of Solids 63, 2269 (2002) · 8 pages, 4 figures, contribution to SNS 2001, Chicago; author web page: http://pantheon.yale.edu/~subir; (v3) updated refs
arxiv created 2001/08/26 · openalex publication_date 2002/12/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We argue that aspects of the anomalous, low temperature, spin and charge dynamics of the high temperature superconductors can be understood by studying the corresponding physics of undoped Mott insulators. Such insulators display a quantum transition from a magnetically ordered Neel state to a confining paramagnet with a spin gap; the latter state has bond-centered charge order, a low energy S=1 spin exciton, confinement of S=1/2 spinons, and a free S=1/2 moment near non-magnetic impurities. We discuss how these characteristics, and the quantum phase transitions, evolve upon doping the insulator into a d-wave superconductor. This theoretical framework was used to make a number of predictions for STM measurements and for the phase diagram of the doped Mott insulator in an applied magnetic field.