Evidence for a Gapped Spin Liquid Ground State in Herbertsmithite Kagome Heisenberg Antiferromagnet

          @misc{ scivideos_PIRSA:16050038,
            doi = {10.48660/16050038},
            url = {https://pirsa.org/16050038},
            author = {Imai, Takashi},
            keywords = {Quantum Matter},
            language = {en},
            title = {Evidence for a Gapped Spin Liquid Ground State in Herbertsmithite Kagome Heisenberg Antiferromagnet},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2016},
            month = {may},
            note = {PIRSA:16050038 see, \url{https://scivideos.org/pirsa/16050038}}
          }
          

Abstract

The kagome lattice in a mineral compound "Herbertsmithite" represents structurally the most ideal kagome Heisenberg antiferromagnet known to date. Herbertsmithite does not undergo a magnetic long-range order or spin freezing at least down to ~J/2000. We will present 17-Oxygen and 2-Deuterium single crystal NMR study of Herbertsmithite. We will demonstrate that the ground state of the kagome plane has a spin gap ~ 0.05J [1], and ~5% excess Cu2+ ions occupying the out-of-plane Zn2+ sites are the only defects [2]. [1] M. Fu et al., Science 350, 655 (2015). [2] T. Imai et al., Phys. Rev. B 84, 020411 (2011).