Abstract: The emergent behavior of spin liquids that are born out of geometrical frustration makes them an intriguing state of matter. We show that in the quantum kagome antiferromagnet ${\mathrm{ZnCu}}_{3}({\mathrm{OH})}_{6}{\mathrm{SO}}_{4}$ several different correlated yet fluctuating states exist. By combining complementary local-probe techniques with neutron scattering, we discover a crossover from a critical regime into a gapless spin-liquid phase with decreasing temperature. An additional unconventional instability of the latter phase leads to a s...
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Topics: 
Condensed matter physics
Quantum mechanics