Spin order and phase transitions in chains of polariton condensates

H. Ohadi, A. J. Ramsay, H. Sigurdsson, Y. Del Valle-Inclan Redondo, S. I. Tsintzos, Z. Hatzopoulos, T. C.H. Liew, I. A. Shelykh, Y. G. Rubo, P. G. Savvidis, J. J. Baumberg

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number067401
Number of pages5
JournalPhysical Review Letters
Volume119
Issue number6
Early online date8 Aug 2017
DOIs
Publication statusPublished - 11 Aug 2017

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