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arXiv · 2311.17576

Emergence of a spin-liquid-like phase in quantum spin-ladder Ba2CuTeO6 with chemical substitution

Shalini Badola·Devesh Negi·Aprajita Joshi·Surajit Saha
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Abstract

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.

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Shalini Badola, Devesh Negi, Aprajita Joshi, Surajit Saha. 2023-11-29. Emergence of a spin-liquid-like phase in quantum spin-ladder Ba2CuTeO6 with chemical substitution. https://arxiv.org/abs/2311.17576

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