title: Monitoring oxygen movement by Raman spectroscopy of resistive random access memory with a graphene-inserted electrode.
abstract: In this paper, we employed Ramen spectroscopy to monitor oxygen movement at the electrode/oxide interface by inserting single-layer graphene (SLG). Raman area mapping and single-point measurements show noticeable changes in the D-band, G-band, and 2D-band signals of the SLG during consecutive electrical programming repeated for nine cycles. In addition, the inserted SLG enables the reduction of RESET current by 22 times and programming power consumption by 47 times. Collectively, our results show that monitoring the oxygen movement by Raman spectroscopy for a resistive random access memory (RRAM) is made possible by inserting a single-layer graphene at electrode/oxide interface. This may open up an important analysis tool for investigation of switching mechanism of RRAM.
authors.affiliation: Institute of Microelectronics and Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University, Beijing 100084, China.
authors.forename: He
authors.initials: H
authors.lastname: Tian
authors.forename: Hong-Yu
authors.initials: HY
authors.lastname: Chen
authors.forename: Bin
authors.initials: B
authors.lastname: Gao
authors.forename: Shimeng
authors.initials: S
authors.lastname: Yu
authors.forename: Jiale
authors.initials: J
authors.lastname: Liang
authors.forename: Yi
authors.initials: Y
authors.lastname: Yang
authors.forename: Dan
authors.initials: D
authors.lastname: Xie
authors.forename: Jinfeng
authors.initials: J
authors.lastname: Kang
authors.forename: Tian-Ling
authors.initials: TL
authors.lastname: Ren
authors.forename: Yuegang
authors.initials: Y
authors.lastname: Zhang
authors.forename: H-S Philip
authors.initials: HS
authors.lastname: Wong
mesh_terms: D017097:Electric Impedance; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D007834:Lasers; D036103:Nanotechnology; D010087:Oxides / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry*; D013059:Spectrum Analysis, Raman
chemical_list: D010087:Oxides; D006108:Graphite; D010100:Oxygen