Spin-correlation Driven Ferroelectric Quantum Criticality in a Perovskite Quantum Spin-liquid System, Ba3CuSb2O9

Key Points

• This research aims to explore the role of spin correlations in driving ferroelectric quantum criticality in Ba3CuSb2O9.
• Conducted experiments on the quantum spin-liquid system Ba3CuSb2O9.
• Measured the dielectric constant as a function of temperature.
• Analyzed the T^2 scaling behavior of the dielectric response.
• Demonstrated a clear T^2 scaling of the dielectric constant.
• Showed the existence of spin-correlation-driven ferroelectric quantum criticality.
• Noted the rarity of observing such quantum phenomena.