PIRSA:10050075

Gapless Spin Liquids in Two Dimensions

Fisher, M. (2010). Gapless Spin Liquids in Two Dimensions. Perimeter Institute. https://pirsa.org/10050075

Fisher, Matthew. Gapless Spin Liquids in Two Dimensions. Perimeter Institute, May. 27, 2010, https://pirsa.org/10050075 

          @misc{ pirsa_PIRSA:10050075,
            doi = {10.48660/10050075},
            url = {https://pirsa.org/10050075},
            author = {Fisher, Matthew},
            keywords = {},
            language = {en},
            title = {Gapless Spin Liquids in Two Dimensions},
            publisher = {Perimeter Institute},
            year = {2010},
            month = {may},
            note = {PIRSA:10050075 see, \url{https://pirsa.org}}
          }

Matthew Fisher University of California, Santa Barbara

Talk numberPIRSA:10050075
DOI10.48660/10050075
Collection
Talk Type Conference

Abstract

Many crystalline materials predicted by band theory to be metals are insulators due to strong electron interactions. Both experiment and theory suggest that such Mott-insulators can exhibit exotic gapless spin-liquid ground states, having no magnetic or any other order. Such “critical spin liquids” will possess power law spin correlations which oscillate at various wavevectors. In a sub-class dubbed “Spin Bose-Metals” the singularities reside along surfaces in momentum space, analogous to a Fermi surface but without long-lived quasiparticle excitations. I will describe recent theoretical progress in accessing such states via controlled numerical and analytical studies on quasi-1d model systems.