Magnetization plateaus of SrCu2(BO3)(2) from a Chern-Simons theory - art. no. 097203

Authors
Misguich, G Jolicoeur, T Girvin, SM
Citation
G. Misguich et al., Magnetization plateaus of SrCu2(BO3)(2) from a Chern-Simons theory - art. no. 097203, PHYS REV L, 8709(9), 2001, pp. 7203
Citations number
27
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
8709
Issue
9
Year of publication
2001
Database
ISI
SICI code
0031-9007(20010827)8709:9<7203:MPOSFA>2.0.ZU;2-6
Abstract
The anti ferromagnetic Heisenberg model on the frustrated Shastry-Sutherlan d lattice is studied by a mapping onto spinless fermions carrying one quant um of statistical flux. Using a mean-field approximation these fermions pop ulate the bands of a generalized Hofstadter problem. Their filling leads to the magnetization curve. For SrCu2(BO3)(2) we reproduce plateaus at 1/3 an d 1/4 of the saturation moment and predict a new one at 1/2. Gaussian fluct uations of the gauge field are shown to be massive at these plateau values.