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Experimental signatures of spin superfluid ground state in canted antiferromagnet Cr <sub>2</sub> O <sub>3</sub> via nonlocal spin transport
Spin superfluid is a novel emerging quantum matter arising from the Bose-Einstein condensate (BEC) of spin-1 bosons. We demonstrate the spin superfluid ground state in canted antiferromagnetic Cr2O3 thin film at low temperatures via nonlocal spin transport. A large enhancement of the nonlocal spin signal is observed below ~ 20 …