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Research published in Science demonstrates a non-volatile switching element capable of operating in 40 picoseconds, with low heat generation, paving the way for faster and more efficient processors in data centers, although scale production and the use of tantalum still pose challenges.
Device that can accelerate processors up to 1,000 times, without significant increase in residual heat, was demonstrated by researchers in Japan and may tackle one of the biggest bottlenecks of data centers: energy consumption for computing and cooling.
Faster processors without increasing heat
The advancement involves a non-volatile switching element, capable of switching information on a picosecond scale. In laboratory tests, the device processed a bit in 40 picoseconds, an interval equivalent to 40 trillionths of a second.
Conventional chips, used as a reference by the researchers, have difficulty operating below one nanosecond.
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The difference is important because processor speed usually comes with increased heat generation. In personal computers, this appears in the activation of fans during heavy tasks. In data centers, the problem scales up, with tens of thousands of servers producing heat continuously.
The study was published on May 14 in the journal Science. The demonstration showed that ultrafast and low-power switching is possible in the picosecond range, without requiring a continuous flow of electricity to maintain the recorded magnetic information.
Light, magnetism, and ultrathin layers
The device was built on a silica base, with ultrathin layers of tantalum and Mn3Sn. Tantalum was used because it is a refractory metal capable of storing and releasing electricity. Mn3Sn was included in the architecture for its antiferromagnetic behavior.
This characteristic makes the material magnetically stable and less susceptible to interference from external magnetic fields. The combination allowed scientists to control magnetic states at high speed, without relying on the typical operation of conventional electronic processors.
In our tests, ultrafast light pulses, with up to 60 picoseconds per pulse, were generated within the usual wavelength range of communications. Each pulse passed through a high-speed photodetector called a uni-traveling-carrier photodiode, or UTD-PD.
When the switching element received the pulses from the UTD-PD, the electron spins in the material changed. The researchers recorded a tiny magnetic force, sufficient to confirm the state change used in information processing.
Why the discovery interests data centers
Residual heat is a direct barrier to expanding processing capacity in data centers. The faster and more intense the processors’ work, the greater the demand for energy and cooling systems tends to be.
The non-volatile element demonstrated in Japan can bypass this limit because it retains magnetic information without continuous electrical power. In trials, the device functioned consistently and reliably after more than a billion switches, signaling internal stability.
Another central point is the low thermal generation. The process produced minimal additional heat compared to the operation of a conventional processor. For scientists, this combination can significantly reduce the global energy demand of processors used in high-performance computing.
Prototype may emerge by 2030, but scaling is still a challenge
Despite the laboratory performance, the technology still needs to overcome obstacles before reaching real systems. One of them is testing the device outside controlled conditions, where environmental factors may impair the observed results.
Scaling up manufacturing is also a sensitive point. Tantalum is a rare metal and already in high demand, which may create supply limitations. Furthermore, it will be necessary to develop an industrial process capable of producing the devices in large volumes.
The researchers state that a chip prototype could be ready by 2030. The next step includes further reducing the thickness of the Mn3Sn layer to decrease energy consumption and advancing a commercial manufacturing route.
Study available at this link.
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