title: Conductance quantization in a Ag filament-based polymer resistive memory.
abstract: Resistive switching and conductance quantization are systematically studied in a Ag/poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester/indium-tin oxide sandwich structure. The observed bipolar switching behavior can be attributed to the formation and dissolution of Ag filaments during positive and negative voltage sweeps, respectively. More importantly, conductance quantization with both integer and half integer multiples of single atomic point contact can be realized by slowing down the voltage sweep speed as well as by pulse measurement. The former may reflect the formed Ag filaments with different atomic point contacts, while the latter probably originates from the interaction between the Ag filaments and the elemental hydrogen provided by the organic storage medium. With appropriate current compliances, low resistance states with desired quantized conductance values are successfully achieved, thus showing the potential for ultrahigh density memory applications. Besides, 100 successive switching cycles with densely distributed resistance values of each resistance state and extrapolated retention properties over ten years are also demonstrated.
authors.affiliation: Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering,Tsinghua University, Beijing 100084, People's Republic of China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Gao
authors.forename: Fei
authors.initials: F
authors.lastname: Zeng
authors.forename: Chao
authors.initials: C
authors.lastname: Chen
authors.forename: Guangsheng
authors.initials: G
authors.lastname: Tang
authors.forename: Yisong
authors.initials: Y
authors.lastname: Lin
authors.forename: Zifeng
authors.initials: Z
authors.lastname: Zheng
authors.forename: Cheng
authors.initials: C
authors.lastname: Song
authors.forename: Feng
authors.initials: F
authors.lastname: Pan