2008/06/26 by Michael J. Lawler, Michael Lawler, Arun Paramekanti +2 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Electron #Gapless playback #Ground state #Heisenberg model #Lattice (music) #Organic and Molecular Conductors Research #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quantum spin liquid #Spin polarization #Spinon #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.101.197202
published as Phys. Rev. Lett. 101, 197202 (2008) · 4+ pages, 3 figs
arxiv created 2008/06/26 · openalex publication_date 2008/11/03 · arxiv updated 2009/12/01 · openalex created_date 2017/03/16 · openalex updated_date 2026/08/05
Recent experiments indicate that Na4Ir3O8, a material in which s=1/2 Ir local moments live on a three-dimensional "hyperkagome" lattice of corner-sharing triangles, may have a quantum spin liquid ground state with gapless spin excitations. Using a combination of exact diagonalization, symmetry analysis of fermionic mean field ground states and Gutzwiller projected variational wave functions studies, we propose a quantum spin liquid with spinon Fermi surfaces as a favorable candidate for the ground state of the Heisenberg model on this lattice. We point out implications of this proposal for thermodynamic properties and discuss possible weak instabilities of the spinon Fermi surfaces.