Spin Order and Phase Transitions in Chains of Polariton Condensates
Physical Review Letters
American Physical Society
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Ohadi, H., Ramsay, A., Sigurdsson, H., Del Valle-Inclan Redondo, Y., Tsintzos, S., Hatzopoulos, Z., Liew, T., et al. (2017). Spin Order and Phase Transitions in Chains of Polariton Condensates. Physical Review Letters, 119 (067401) https://doi.org/10.1103/PhysRevLett.119.067401
We demonstrate that multiply coupled spinor polariton condensates can be optically tuned through a sequence of spin-ordered phases by changing the coupling strength between nearest neighbors. For closed four-condensate chains these phases span from ferromagnetic (FM) to antiferromagnetic (AFM), separated by an unexpected crossover phase. This crossover phase is composed of alternating FM-AFM bonds. For larger eight-condensate chains, we show the critical role of spatial inhomogeneities and demonstrate a scheme to overcome them and prepare any desired spin state. Our observations thus demonstrate a fully controllable nonequilibrium spin lattice.
Is supplemented by: https://doi.org/10.17863/CAM.11959
We acknowledge Grants No. EPSRC EP/L027151/1, No. EU INDEX 289968, No. ERC “POLAFLOW” Starting Grant, ERC LINASS 320503, Spanish MEC (MAT2008- 01555), Mexican CONACYT 251808, Leverhulme Trust Grant No. VP1-2013-011 and Fundación La Caixa. H. S. and I. S. acknowledge support by the Research Fund of the University of Iceland, The Icelandic Research Fund, Grant No. 163082-051. T. L. was supported by the MOE AcRF Tier 1 Grant No. 2016-T1-001-084. P. S. acknowledges financial support from the Stavros Niarchos Foundation, “ARCHERS” project.
Engineering and Physical Sciences Research Council (EP/L027151/1)
Leverhulme Trust (VP1-2013-011)
European Research Council (320503)
European Commission (289968)
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External DOI: https://doi.org/10.1103/PhysRevLett.119.067401
This record's URL: https://www.repository.cam.ac.uk/handle/1810/265726