标题： 可调谐的二维电子气在铁电钽酸钾铌酸盐的界面处 显示英文标题

标题： Tunable Two-Dimensional Electron Gas at the Interfaces of Ferroelectric Potassium Tantalate Niobates

摘要： 复杂氧化物的异质界面已成为发现新物理现象和推动集成传感、存储和计算技术发展的有前途的平台。 然而，在铁电氧化物基场效应晶体管（FET）结构中实现对二维电子气（2DEG）的精确控制仍然具有挑战性。 在此，我们首次展示了通过在(001)取向的铁电钽酸钾铌基板上沉积非晶态LaAlO3（LAO）薄膜而制成的可调谐2DEG系统。 在高温和高氧压条件下生长的界面表现出良好的金属导电性。 值得注意的是，在108 K以下观察到了具有明显迟滞效应和持续电场调制电阻的明确金属2DEG，在7 K时实现了11.6%的电阻调制。这些结果强调了将这种行为扩展到其他氧化物基2DEG系统的潜力，并有助于进一步探索复杂氧化物异质结构中的铁电金属。 显示英文摘要

摘要： The heterointerfaces at complex oxides have emerged as a promising platform for discovering novel physical phenomena and advancing integrated sensing, storage, and computing technologies. Nevertheless, achieving precise control over a two-dimensional electron gas (2DEG) in a ferroelectric oxide-based field-effect transistor (FET) configuration remains challenging. Here, we firstly demonstrate a tunable 2DEG system fabricated by depositing an amorphous LaAlO3(LAO) film onto a (001)-oriented ferroelectric potassium tantalate niobate substrate. Interfaces grown under high-temperature and high-oxygen-pressure conditions exhibit a good metallic conduction. Notably, well-defined metallic 2DEGs displaying pronounced hysteresis and persistent electric-field-modulated resistance are observed below 108 K, achieving a resistance modulation of 11.6% at 7 K. These results underscore the potential for extending such behavior to other oxide-based 2DEG systems and facilitate further exploration of ferroelectric metals in complex oxide heterostructures.