  Quantum fluctuations enhanced by frustration and subtle interplay between
competing degrees of freedom offer an ideal ground to realize novel states with
fractional quantum numbers in quantum materials that defy standard theoretical
paradigms. Quantum spin liquid (QSL) is a highly entangled state wherein
frustration induced strong quantum fluctuations preclude symmetry breaking
phase transitions down to zero temperature without any order parameter.
Experimental realizations of QSL in quantum materials with spin dimensionality
greater than one is very rare. Here, we present our thermodynamic, nuclear
magnetic resonance, muon spin relaxation and inelastic neutron scattering
studies of a new rare-earth hyperkagome compound Li3Yb3Te2O12 in which Yb3+
ions constitute a three dimensional spin-lattice without any detectable
disorder. Our comprehensive experiments evince neither signature of magnetic
ordering nor spin freezing down to 38 mK that suggest the realization of
dynamic liquid-like ground state in this antiferromagnet. The ground state of
this material is interpreted by a low energy Jeff = 1/2 degrees of freedom with
short range spin correlations. The present results demonstrate a viable basis
to explore spin-orbit driven enigmatic correlated quantum states in a new class
of rare-earth based three dimensional frustrated magnets that may open new
avenues in theoretical and experimental search for spin liquids.
