Interface*

The correlated oxide interface LaAlO₃/SrTiO₃ (LAO/STO) manifests distinctive emergent phenomena, including quantum oscillations^[1], strong Rashaba spin-orbit coupling^[2] (SOC), and electron pairing without superconductivity^[3]. These properties can usually be tuned by electric and magnetic fields and temperature. Here we realize a continuous strain tunning of the LAO/STO interface at 1.5 K through a homemade amplified strain cell. Consequently, an ultra-low-field quantum oscillation gradually emerges as carrier density and mobility are greatly tuned by the compressive strain. Further combined with a milli-Kelvin atomic force microscope, our platform is promising to explore strain tunable behaviors in real space and by quantum transport at oxide interfaces.