Bulletin of the American Physical Society
2007 APS March Meeting
Volume 52, Number 1
Monday–Friday, March 5–9, 2007; Denver, Colorado
Session H16: Focus Session: 2D Quantum Magnetism
8:00 AM–11:00 AM,
Tuesday, March 6, 2007
Colorado Convention Center Room: Korbel 4F
Sponsoring Unit: GMAG
Chair: Igor Zaliznyak, Brookhaven National Laboratory
Abstract ID: BAPS.2007.MAR.H16.12
Abstract: H16.00012 : Theory of spin liquid on the kagome lattice and application to ZnCu$_3$(OH)$_6$Cl$_2$: Projected wavefunction study*
10:36 AM–10:48 AM
Preview Abstract Abstract
Patrick A. Lee
Recent experiments on ZnCu$_3$(OH)$_6$Cl$_2$ have drawn new attention to the ground state of the spin-1/2 kagome lattice antiferromagnet. We have examined this issue using Gutzwiller projected fermion wavefunctions, and propose that the ground state is described by the projection of fermions hopping on the kagome lattice in a background $\pi$-flux on the hexagons and zero flux on the triangles. This state has gapless Dirac points and is an algebraic spin liquid. Properties of the wavefunction and low-energy excitations will be discussed, with a focus on application to the experiments.
*This research is supported by NSF grant No. DMR-0433632 and DMR-0517222.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2007.MAR.H16.12
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