S15-116 Energy-efficient phase change memory This patented technology is a scalable, reliable non-volatile memory device that uses graphene as a thermal barrier to improve energy efficiency and reliability of phase change material (PCM). Ethan Ahn Scott Fong Yongsung Kim Seunghyun Lee Aditya Sood Christopher Neumann Mehdi Asheghi Kenneth Goodson Eric Pop H.-S. Philip Wong