Phase change memory (PCM) devices are known to reduce in power consumption as the bit volume and contact area of their electrodes are scaled down. Here, we demonstrate two types of low-power PCM devices with lateral graphene ribbon electrodes: one in which the graphene is patterned into narrow nanoribbons and the other where the phase change material is patterned into nanoribbons. The sharp graphene “edge” contacts enable switching with threshold voltages as low as approx. 3 V, low programming currents (<1uA SET and <10 uA RESET) and OFF/ON resistance ratios >100. Large-scale fabrication with graphene grown by chemical vapor deposition also enables the study of heterogeneous integration and that of variability for such nanomaterials and devices.
Behnam, A., Xiong, F., Cappelli, A., Wang, N.C., Carrion, E.A., Hong, S., et al. (2015). Nanoscale phase change memory with graphene ribbon electrodes. APPLIED PHYSICS LETTERS, 107(12), 123508-1-123508-4 [10.1063/1.4931491].
Nanoscale phase change memory with graphene ribbon electrodes
PICCININI, ENRICO;
2015
Abstract
Phase change memory (PCM) devices are known to reduce in power consumption as the bit volume and contact area of their electrodes are scaled down. Here, we demonstrate two types of low-power PCM devices with lateral graphene ribbon electrodes: one in which the graphene is patterned into narrow nanoribbons and the other where the phase change material is patterned into nanoribbons. The sharp graphene “edge” contacts enable switching with threshold voltages as low as approx. 3 V, low programming currents (<1uA SET and <10 uA RESET) and OFF/ON resistance ratios >100. Large-scale fabrication with graphene grown by chemical vapor deposition also enables the study of heterogeneous integration and that of variability for such nanomaterials and devices.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
