Graphene "sandwich" enables memory that operates at 700 °C

The main advantage: it operates stably at 700 °C. Moreover, this is not the limit of the device itself, but merely the limit of the laboratory equipment.

Conventional silicon electronics dies within minutes at such a temperature. The new memristor withstands extreme heat thanks to a thin "sandwich": a layer of graphene between tungsten and hafnium oxide acts as a reliable barrier.

In tests, the device retained data for more than 50 hours at 700 °C, endured over a billion switching cycles, and operated at low voltage. When the temperature reached 700 degrees, the experiment had to be stopped — the furnace could no longer heat any stronger.

Such memory opens prospects for probes on Venus, sensors in nuclear reactors, deep drilling, and space technology. Additionally, it could help create more energy-efficient neural networks that don't require powerful cooling.

Until now, high-temperature devices were limited to 300–400 °C. The new memristor has surpassed this boundary with a significant margin.

Source: Science, March 26, 2026, DOI: 10.1126/science.adb9934