Author(s): S. K. Choi, R. Coldea, A. N. Kolmogorov, T. Lancaster, I. I. Mazin, S. J. Blundell, P. G. Radaelli, Yogesh Singh, P. Gegenwart, K. R. Choi, S.-W. Cheong, P. J. Baker, C. Stock, and J. Taylor We report inelastic neutron scattering measurements on Na 2 IrO 3 , a candidate for the Kitaev spin model on the honeycomb lattice. We observe spin-wave excitations below 5 meV with a dispersion that can be accounted for by including substantial further-neighbor exchanges that stabilize zigzag magnetic ... [Phys. Rev. Lett. 108, 127204] Published Tue Mar 20, 2012
Condensed Matter: Electronic Properties, etc.