Abstract Correlated-perovskites display extraordinary analog functionalities catering for neuromorphic computing and advanced field-perceptions, transcending post-Moore limitations. Nevertheless, it is yet infeasible to achieve scalable material growth of correlated-perovskites at micrometer-scale thicknesses, a prerequisite for enabling device resistances compatible with analog circuit requirements. Herein, we demonstrate ultra-effective growths of archetypal metastable correlated-perovskites, e.g. nickelates (RENiO3), via liquid phase epitaxy within alkali-chlorides molten-salts, realizing μm-thickness and scalability. The molten-salts provide ultra-stable thermodynamic environment and consistent ionic-precursor availability for long-period oriented growths, effectively enabling stacking-faults formation to mitigate high-magnitude lattice-mismatches. This bridges current technological-discontinuities in μm-thick film-growths of RENiO3, and achieves record-competing electronic phase transitions at analog-compatible resistances enabling more effective and energy-efficient analog cryogenic alarming applications. For the first time, wafer-scale RENiO3 with high-uniformity was successfully grown within low melting-point eutectic alkali-chlorides, eliminating previous reliance on MPa-high oxygen-pressures. Our strategy was extendable to multiple oxide-systems, covering diverse functionalities, e.g. colossal-magnetoresistance, oxide-electrodes, and superconductivity.
Bian et al. (Wed,) studied this question.