Exploring Quantum Matter with the High Temperature Superconductors

          @misc{ pirsa_PIRSA:15060024,
            doi = {10.48660/15060024},
            url = {https://pirsa.org/15060024},
            author = {Sachdev, Subir},
            keywords = {},
            language = {en},
            title = {Exploring Quantum Matter with the High Temperature Superconductors},
            publisher = {Perimeter Institute},
            year = {2015},
            month = {jun},
            note = {PIRSA:15060024 see, \url{https://pirsa.org}}
          }
          

Abstract

Apart from high temperature superconductivity, the cuprate compounds also display fascinating new types of metallic states from which the superconductivity descends. These metals have served as a remarkable laboratory for modern ideas on long-range quantum entanglement and its consequences for the properties of quantum matter. In the low carrier density “pseudogap” regime we observe a metal which is similar in many respects to simple metals like silver; however, there is increasing evidence that the simple metallic character co-exists with more exotic topological order. At higher dopings we have the “strange metal” which differs in almost all respects from simple metals, and has no well-defined quasiparticle excitations. I will describe a mean-field model of a strange metal which, remarkably, yields the Bekenstein-Hawking entropy of charged black holes.