Experimental realization of a 2D fractional quantum spin liquid

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The ground-state ordering and dynamics of the two-dimensional (2D) S=1/2 frustrated Heisenberg antiferromagnet Cs_2CuCl_4 is 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 RVB state, arising from pairs of S=1/2 spinons. Quantum renormalization factors for the excitation energies (1.65) and incommensuration (0.56) are large.
4 pages revtex, 3 ps figures, new data added to fig. 1f, includes referees' comments

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Strongly Correlated Electrons, Statistical Mechanics

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http://salesiana.dossiersoluciones.com/handle/123456789/16573

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0007172
 http://arxiv.org/abs/cond-mat/0007172
 Phys. Rev. Lett. 86, 1335 (2001)
 doi:10.1103/PhysRevLett.86.1335

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arXiv