  Stabilization of the quantum spin liquids is vital to realize applications in
spintronics and quantum computing. The unique magnetic structure of Ba2CuTeO6
comprising of coupled spin-ladders with finite inter-ladder coupling brings the
system close to the quantum critical point. This opens up possibilities to
stabilize unconventional magnetic phases by tailoring the intra- and
inter-ladder exchange couplings. Here, we demonstrate a spin-liquid-like phase
in Ba2CuTeO6 using the method of chemical substitution. We choose non-magnetic
La3+ cation to substitute the Ba2+ in Ba2CuTeO6 and present signature
fingerprints such as deprived magnetic transition, non-dispersive AC
susceptibility, magnetic field-independent heat capacity, and broad Raman
continuum supporting the emergence of a spin-liquid-like phase. We believe that
an increased magnetic frustration and spin-fractionalization upon chemical
substitution play a crucial role in driving such a state. In addition,
temperature and magnetic field-dependent phonon response indicate the presence
of magnetostriction (spin-lattice coupling) in La-doped Ba2CuTeO6, a notable
property of spin-liquids.
