NONCLASSICAL DISORDERED PHASE IN THE STRONG QUANTUM LIMIT OF FRUSTRATED ANTIFERROMAGNETS

Citation
Ha. Ceccatto et al., NONCLASSICAL DISORDERED PHASE IN THE STRONG QUANTUM LIMIT OF FRUSTRATED ANTIFERROMAGNETS, Physical review. B, Condensed matter, 47(18), 1993, pp. 12329-12332
Citations number
24
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
01631829
Volume
47
Issue
18
Year of publication
1993
Pages
12329 - 12332
Database
ISI
SICI code
0163-1829(1993)47:18<12329:NDPITS>2.0.ZU;2-2
Abstract
The rotationally invariant Schwinger-boson approach to quantum helimag nets is discussed. It is shown that in order to get quantitative agree ment with exact results on finite lattices, parity-breaking pairing of bosons must be allowed. For the J1-J2-J3 model on the special line J2 = 2J3, a quantum disordered phase is found, though notably only in th e strong quantum limit S = 1/2. The theory predicts the direct melting of biaxial helimagnetic order into an isotropic spin fluid, without t he formation of an intermediate spin-nematic phase as recently suggest ed.