UC San Diego uses electric currents to control memory in brain-inspired device

Summary

Researchers at UC San Diego demonstrated that they can control the transition of a vanadium dioxide-based memristor between predictable (memory-retaining) and unpredictable (memory-erased) states by driving or reversing a nanoscale domain 'jamming' process using electric currents.

Why it matters

This study offers a physical and structural mechanism for in-memory computing, where information is encoded in the material's own lattice history, eliminating the need for separate memory and logic units. If scalable, such devices could reduce the energy burden of data transfer between processors and memory in traditional architectures.

Highlights

• Domain 'jamming' transitions make the state predictable; lower currents reverse this process. It acts as a simple electrical control switch between memory and forgetting.
• Consistent X-ray diffraction tracked structural evolution over thousands of seconds, linking electrical history to internal structure.
• Published in Nature Communications; the study was led by physics professor Oleg Shpyrko at UC San Diego.

Critical take

The article honestly acknowledges that this is a single experimental material, not a working neuromorphic chip. However, the 'controlling memory' framing carries a risk of overstating a proof of concept. Issues regarding scalability, inter-device consistency, transition speed, and measurable energy savings in real circuits remain unaddressed.