Fast Spiking of a Mott VO2-Carbon Nanotube Composite Device
Bohaichuk, SM; Kumar, S; Pitner, G; Mcclellan, CJ; Jeong, J; Samant, MG; Wong, HP; Parkin, SSP; Williams, RS; Pop, E
| HERO ID | 6308070 |
|---|---|
| In Press | No |
| Year | 2019 |
| Title | Fast Spiking of a Mott VO2-Carbon Nanotube Composite Device |
| Authors | Bohaichuk, SM; Kumar, S; Pitner, G; Mcclellan, CJ; Jeong, J; Samant, MG; Wong, HP; Parkin, SSP; Williams, RS; Pop, E |
| Journal | Nano Letters |
| Volume | 19 |
| Issue | 10 |
| Page Numbers | 6751-6755 |
| Abstract | The recent surge of interest in brain-inspired computing and power-efficient electronics has dramatically bolstered development of computation and communication using neuron-like spiking signals. Devices that can produce rapid and energy-efficient spiking could significantly advance these applications. Here we demonstrate direct current or voltage-driven periodic spiking with sub-20 ns pulse widths from a single device composed of a thin VO2 film with a metallic carbon nanotube as a nanoscale heater, without using an external capacitor. Compared with VO2-only devices, adding the nanotube heater dramatically decreases the transient duration and pulse energy, and increases the spiking frequency, by up to 3 orders of magnitude. This is caused by heating and cooling of the VO2 across its insulator-metal transition being localized to a nanoscale conduction channel in an otherwise bulk medium. This result provides an important component of energy-efficient neuromorphic computing systems and a lithography-free technique for energy-scaling of electronic devices that operate via bulk mechanisms. |
| Doi | 10.1021/acs.nanolett.9b01554 |
| Pmid | 31433663 |
| Wosid | WOS:000490353500006 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |