Two-terminal floating-gate memory with van der Waals heterostructures for ultrahigh on/off ratioopen access
- Authors
- Lee, K[Lee, Kiyoung]; Ko, DS[Ko, Dong-Su]; Heo, J[Heo, Jinseong]; Park, S[Park, Seongjun]; Shin, YS[Shin, Yong Seon]; Kim, YR[Kim, Young Rae]; Kang, WT[Kang, Won Tae]; Lee, IM[Lee, Il Min]; Yu, WJ[Yu, Woo Jong]; Vu, QA[Quoc An Vu]; Nguyen, VL[Van Luan Nguyen]; Kim, H[Kim, Hyun]; Luong, DH[Dinh Hoa Luong]; Lee, YH[Lee, Young Hee]
- Issue Date
- Sep-2016
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- NATURE COMMUNICATIONS, v.7
- Indexed
- SCIE
SCOPUS
- Journal Title
- NATURE COMMUNICATIONS
- Volume
- 7
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/35374
- DOI
- 10.1038/ncomms12725
- ISSN
- 2041-1723
- Abstract
- Concepts of non-volatile memory to replace conventional flash memory have suffered from low material reliability and high off-state current, and the use of a thick, rigid blocking oxide layer in flash memory further restricts vertical scale-up. Here, we report a two-terminal floating gate memory, tunnelling random access memory fabricated by a monolayer MoS2/h-BN/monolayer graphene vertical stack. Our device uses a two-terminal electrode for current flow in the MoS2 channel and simultaneously for charging and discharging the graphene floating gate through the h-BN tunnelling barrier. By effective charge tunnelling through crystalline h-BN layer and storing charges in graphene layer, our memory device demonstrates an ultimately low off-state current of 10-(14) A, leading to ultrahigh on/off ratio over 10(9), about similar to 10(3) times higher than other two-terminal memories. Furthermore, the absence of thick, rigid blocking oxides enables high stretchability (>19%) which is useful for soft electronics.
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- Appears in
Collections - Information and Communication Engineering > School of Electronic and Electrical Engineering > 1. Journal Articles
- Institute of Basic Science > Institute of Basic Science > 1. Journal Articles
- Science > Department of Physics > 1. Journal Articles
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