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 number
PIRSA:10050075
Collection
Talk Type
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.