Researchers Switched Graphene Magnetism Using Voltage
A new technique enables reconfigurable magnetic states in graphene stacks without breaking chemical bonds.
Updated on Oct. 14, 2026 in Materials Science
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Researchers at Cornell University have demonstrated that a four-layer graphene stack can be toggled between magnetic and nonmagnetic states using applied voltage. This research-stage technique maintains the magnetic state even after the external voltage is removed.
Why it matters
The study offers an energy-efficient method for structural reconfiguration, potentially laying the foundation for future nonvolatile memory devices and reconfigurable quantum materials. By manipulating physical alignment rather than chemical composition, the process avoids the need to break strong bonds.
The team utilized a four-layer graphene stack that switches between a nonmagnetic Bernal configuration and a magnetic rhombohedral configuration. This state change is achieved by applying voltage to slide the layers, exploiting the material's inherent van der Waals bonds.
The players
Cornell University
An Ivy League research institution known for its advanced work in condensed matter physics and materials science.
Stanford University
A leading research university recognized for its extensive contributions to nanotechnology and semiconductor innovation.
Stony Brook University
A public research university that maintains a robust research portfolio in physical sciences and experimental materials characterization.
The details
The process relies on manipulating van der Waals bonds—the weak electrostatic forces that attract neutral molecules to one another—to shift the alignment of the four graphene layers. By applying a specific voltage, the layers slide into an atomic arrangement that induces magnetism. Because the structural shift is stable, the material does not require a constant power supply to maintain its magnetic state once configured.
Timeline
October 14, 2026: The research was published in the journal Nature Nanotechnology.
The Tech Race
This work follows the long-standing industry effort to develop nonvolatile memory technologies, offering a new physical approach to state retention. It advances the race to find energy-efficient alternatives to current silicon-based storage architectures.
This development is currently in the research stage and does not yet affect commercial products or consumer electronics. If successfully scaled, it could eventually influence the manufacturing of more efficient, nonvolatile memory components for future computing devices.
The takeaway
The ability to toggle magnetic states via voltage provides a pathway for ultra-low-power memory, moving away from current chemical-based approaches. Future developments will focus on whether this stacking mechanism can be reliably integrated into larger, multi-layer semiconductor architectures.
Further reading
Explore more developments in atom-level engineering and phase-shifting materials in our Materials Science section.
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