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The complexity of the antiferromagnetic orders observed in the honeycombiridates is a double-edged sword in the search for a quantum spin-liquid groundstate: both attesting that the magnetic interactions provide many of thenecessary ingredients, but simultaneously impeding access. As a result, focushas been drawn to the unusual magnetic orders and the hints they provide to theunderlying spin correlations. However, the study of any particular brokensymmetry state generally provides little clue as to the possibilities of othernearby ground states \cite{Anderson}. Here we use extreme magnetic fields toreveal the extent of the spin correlations in $\gamma$-lithium iridate. We findthat a magnetic field with a small component along the magnetic easy-axis meltslong-range order, revealing a bistable, strongly correlated spin state. Farfrom the usual destruction of antiferromagnetism via spin polarization, thecorrelated spin state possesses only a small fraction of the total moment,without evidence for long-range order up to the highest attainable magneticfields (>90 T).

Robust spin correlations at high magnetic fields in the honeycomb iridates