Emerging horizons in phase-change materials for non-volatile memory

Phase Change Memory (PCM) technology, particularly utilizing GeTe-based materials, has emerged as a compelling alternative to traditional nonvolatile memory systems, offering significant advancements in speed, scalability, and endurance. This review provides an in-depth analysis of recent developments in GeTe PCM, focusing on the challenges and breakthroughs that have characterized its evolution. Key aspects of resistance drift, material aging, and crystallization dynamics were explored, with special attention to the fundamental mechanisms, including β-relaxation and the Fragile-to-Strong Transition in supercooled liquids, along with Peierls distortions. Innovations in material engineering, such as alloying and nanoconfinement, have been discussed for their roles in enhancing device performance and reliability. Furthermore, this review examines the impact of advanced fabrication techniques and novel device architectures on the practical applications of PCM. By integrating these technological advancements with a theoretical understanding of the material properties, this review highlights the transformative potential of GeTe PCM across various applications, setting the stage for future research directions aimed at fully realizing the capabilities of this promising memory technology.