Phase Diagrams of Spin-S Kitaev Ladders
ORAL
Abstract
We investigate the ground states of spin-S Kitaev ladders using exact analytical solutions, perturbation theory and the density matrix renormalization group (DMRG) method.
We find an even-odd effect: in the case of half-integer S, we find phases with spontaneous symmetry breaking (SSB) and symmetry-protected topological (SPT) order; for integer S, we find SSB and trivial paramagnetic phases. We also study the transitions between the various phases; notably, for half-integer S we find a transition between two distinct SPT orders, and for integer S we find unnecessary first order phase transitions within a trivial phase.
*Research at Perimeter Institute is supported in part by the Government of Canada through the Department of Innovation, Science and Economic Development Canada and by the Province of Ontario through the Ministry of Colleges and Universities.
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Presenters
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Yushao Chen
- Perimeter Institute