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. 2001 Feb 12;86(7):1335-8.
doi: 10.1103/PhysRevLett.86.1335.

Experimental realization of a 2D fractional quantum spin liquid

R Coldea  1 , D A Tennant, A M Tsvelik, Z Tylczynski
Affiliations

Experimental realization of a 2D fractional quantum spin liquid

R Coldea et al. Phys Rev Lett. .

Abstract

The ground-state ordering and dynamics of the two-dimensional S = 1/2 frustrated Heisenberg antiferromagnet Cs(2)CuCl(4) are explored using neutron scattering in high magnetic fields. We find that the dynamic correlations show a highly dispersive continuum of excited states, characteristic of the resonating valence bond state, arising from pairs of S = 1/2 spinons. Quantum renormalization factors for the excitation energies (1.65) and incommensuration (0.56) are large.

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