000180999 001__ 180999
000180999 005__ 20180913061529.0
000180999 0247_ $$2doi$$a10.1103/PhysRevLett.108.207204
000180999 02470 $$2ISI$$a000307068600011
000180999 037__ $$aARTICLE
000180999 245__ $$aKagome Antiferromagnet: A Chiral Topological Spin Liquid?
000180999 260__ $$c2012
000180999 269__ $$a2012
000180999 336__ $$aJournal Articles
000180999 520__ $$aInspired by the recent discovery of a new instability towards a chiral phase of the classical Heisenberg model on the kagome lattice, we propose a specific chiral spin liquid that reconciles different, well-established results concerning both the classical and quantum models. This proposal is analyzed in an extended mean-field Schwinger boson framework encompassing time reversal symmetry breaking phases, which allows both a classical and a quantum phase description. At low temperatures, we find that quantum fluctuations favor this chiral phase, which is stable against small perturbations of second- and third-neighbor interactions. For spin-1/2, this phase may be, beyond the mean field, a chiral gapped spin liquid. Such a phase is consistent with the density matrix renormalization group results of Yan et al. [Science 332, 1173 (2011)]. Mysterious features of the low-lying excitations of exact diagonalization spectra also find an explanation in this framework. Moreover, thermal fluctuations compete with quantum ones and induce a transition from this flux phase to a planar zero flux phase at a nonzero value of the renormalized temperature (T=S-2), reconciling these results with those obtained for the classical system.
000180999 6531_ $$aHeisenberg-Antiferromagnet
000180999 6531_ $$aTriangular-Lattice
000180999 6531_ $$aFrustrated Magnets
000180999 6531_ $$aStates
000180999 6531_ $$aOrder
000180999 6531_ $$aExcitations
000180999 6531_ $$aDisorder
000180999 700__ $$aMessio, Laura$$uEcole Polytech Fed Lausanne, Inst Theoret Phys, CH-1015 Lausanne, Switzerland
000180999 700__ $$aBernu, Bernard$$uUniv Paris 06, UMR CNRS 7600, Lab Phys Theor Matiere Condensee, F-75252 Paris 05, France
000180999 700__ $$aLhuillier, Claire$$uUniv Paris 06, UMR CNRS 7600, Lab Phys Theor Matiere Condensee, F-75252 Paris 05, France
000180999 773__ $$j108$$q-$$tPhysical Review Letters
000180999 909C0 $$0252443$$pITP$$xU10181
000180999 909CO $$ooai:infoscience.tind.io:180999$$particle
000180999 937__ $$aEPFL-ARTICLE-180999
000180999 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000180999 980__ $$aARTICLE