Scientists crack the code linking magnetism to graphene's physics

Engineers at the University of Illinois Urbana-Champaign just made a connection that shouldn't exist—and it's opening doors to smaller, smarter wireless devices.

They discovered that magnetic materials can follow the exact same mathematical rules as graphene, the wonder material everyone's been obsessed with for two decades. This isn't a metaphorical similarity. The equations that describe how electrons move through graphene also describe how magnetic disturbances move through specially designed thin films. It's like finding out two completely different instruments play the same song.

"It's not at all obvious that there is an analogy between 2D electronics and 2D magnetic behaviors, and we're still amazed at how well this analogy works," said Bobby Kaman, the lead researcher. The team published their findings in Physical Review X in February.

Here's where it gets interesting: Kaman, a graduate student in materials science, was studying metamaterials—materials engineered with internal structures that behave in ways nature never intended. He noticed that electrons in graphene and tiny magnetic waves in other materials both act like waves. So he wondered: could you engineer a magnetic material to actually mimic graphene's behavior?

To test it, the team created a thin magnetic film with holes arranged in a hexagonal pattern—the same structure as graphene's atomic lattice. When they calculated how magnetic disturbances (called spin waves) moved through the material, the math matched. Perfectly.

But here's the twist. The system turned out far more complex than expected. The material supports nine distinct energy bands, meaning it can do multiple different things at once. One band produces those massless magnetic waves that mirror graphene. Others create localized effects and topological properties that ripple across the bands. "What makes Bobby's work remarkable is that it makes a direct connection between an engineered spin system and a fundamental physics model," said Axel Hoffmann, Kaman's advisor. "Most magnonic systems produce so many different behaviors that scientists just catalog them without understanding why."

The real payoff might be in your phone. Wireless and cellular networks rely on "microwave circulators"—devices that route signals in one direction only. Current versions are bulky, but a magnonic system like this one could shrink them down to micrometer scale. That means smaller components, lighter devices, and more efficient wireless systems.

The team has already filed a patent for their microwave device concepts. What started as curiosity about whether two unrelated areas of physics might connect has turned into a potential blueprint for the next generation of communication hardware.