Graphene has just taken a giant leap forward with the creation of the world’s first working graphene-based semiconductor—a development with profound implications for the future of quantum computing. Scientists from the Georgia Institute of Technology, alongside international collaborators, have overcome one of the major hurdles in electronics: endowing graphene with a band gap, which allows the material to act as a switch, a critical function in semiconductor devices.
For decades, silicon has been the cornerstone of the semiconductor industry, but its limitations are becoming increasingly evident. With the demands of modern technology scaling towards faster, smaller, and more efficient devices, researchers have been in a race against time to find a worthy successor. Graphene, a single layer of carbon atoms arranged in a hexagonal lattice, has long been considered a promising candidate due to its electron mobility can move through it with ten times faster than in silicon.
However, graphene electronics have long been hindered by the lack of the right band gap, preventing it from switching on and off at the correct ratio. By developing a novel way to create a functional band gap in graphene, the Georgia Tech team has unlocked the material’s potential in electronics. They achieved this by fusing graphene onto silicon carbide wafers using a specialized process, which involves heating and cooling in special furnaces and doping with atoms that donate electrons to the system.
The resulting graphene-based semiconductor boasts an electron mobility that operates at terahertz frequencies—up to ten times faster than current silicon-based transistors. This breakthrough paves the way for semiconductors that could power much faster PCs and, more critically, advance the field of quantum computing. As Walter de Heer, a professor at the Georgia Institute of Technology, puts it, “Like light, electrons in graphene have quantum mechanical wave-like properties that can be accessed in devices, particularly at very low temperatures.”
While the integration of graphene-based semiconductors into quantum computers is still a subject of ongoing research, the prospect is tantalizing. The unique wave-like properties of electrons in graphene could be exploited in quantum devices, possibly leading to quantum computers that are not only faster but also more reliable than those using current superconducting technology.
Relevant articles:
– World’s 1st graphene semiconductor could power future quantum computers
– Groundbreaking Graphene-Based Semiconductor: A Leap Towards Faster Computers and Quantum Computing
– World’s First Graphene-Based Functional Semiconductor