Abstract
Muon spin relaxation () experiments on single crystals of the structurally perfect triangular antiferromagnet indicate the absence of both static long-range magnetic order and spin freezing down to 0.048 K in a zero field. Below 0.4 K, the spin relaxation rates, which are proportional to the dynamic correlation function of the spins, exhibit temperature-independent plateaus. All these results unequivocally support the formation of a gapless U(1) quantum spin liquid ground state in the triangular antiferromagnet .
- Received 5 July 2016
DOI:https://doi.org/10.1103/PhysRevLett.117.097201
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