BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Anjana Samarakoon\, UVA-Department of Physics\n\n
Quantum spi n liquids (QSLs) have achieved great interest in both theoretical and expe rimental condensed matter physics due to their remarkable topological prop erties. Among many different candidates\, the Kitaev model on the honeycom b lattice is a 2D prototypical QSL which can be experimentally studied in materials based on iridium or \;ruthenium.. \;Here we study the sp in-1/2 Kitaev model using classical Monte-Carlo and semiclassical spin dyn amics of classical spins on a honeycomb lattice. Both real and reciprocal space pictures highlighting the differences and similarities of the result s to the linear spin wave theory will be discussed in terms dispersion rel ations of the pure-Kitaev limit and beyond. Interestingly\, this technique could capture some of the salient features of the exact quantum solution of the Kitaev model\, such as features resembling the Majorana-like mode c omparable to the Kitaev energy\, which is spectrally narrowed compared to the quantum result\, can be explained by magnon excitations on fluctuating one-dimensional manifolds (loops). Hence the difference from the classica l limit to the quantum limit can be understood by the fractionalization of a magnon to Majorana fermions. The calculations will be directly compared with our neutron scattering data on &alpha\;-RuCl3 which is a prime candi date for experimental realization of Kitaev physics. \;
\n DTSTART:20170223T160000Z LOCATION:Physics Building\, Room 313 SUMMARY:Dynamics of Kitaev-Heisenberg model on a Honeycomb lattice in the c lassical limit END:VEVENT END:VCALENDAR