Experimental realization of a 2D fractional quantum spin liquid

Authors
Coldea, R Tennant, DA Tsvelik, AM Tylczynski, Z
Citation
R. Coldea et al., Experimental realization of a 2D fractional quantum spin liquid, PHYS REV L, 86(7), 2001, pp. 1335-1338
Citations number
27
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
7
Year of publication
2001
Pages
1335 - 1338
Database
ISI
SICI code
0031-9007(20010212)86:7<1335:EROA2F>2.0.ZU;2-5
Abstract
The ground-state ordering and dynamics of the two-dimensional S = 1/2 frust rated Heisenberg antiferromagnet Cs2CuCl4 are explored using neutron scatte ring in high magnetic fields. We find that the dynamic correlations show a highly dispersive continuum of excited states, characteristic of the resona ting valence bond state, arising from pairs of S = 1/2 spinons. Quantum ren ormalization factors for the excitation energies (1.65) and incommensuratio n (0.56) are large.