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Another Material Mimics Graphene's Capabilities

High magnetic fields cause SrMnBi2 to display some of the same characteristics of graphene

1 min read
Another Material Mimics Graphene's Capabilities

While listening to one of the better explanations I’ve heard of where we are with graphene’s capabilities in electronics applications, from Professor Ravi Silva, director of the Advanced Technology Institute at Surrey University, I saw that graphene was getting another competitor in the race for “wonder material” honors. 

You may recall from the beginning of this year how molybdenite was demonstrated to have a number of the same advantages graphene has over silicon in electronics but also has an inherent band gap.

In the joint research carried out in the labs of Helmholtz-Zentrum Dresden-Rossendorf (HZDR) linked to above, Dr. Frederik Wolff-Fabris and Dr. Jun Sung Kim came from South Korea discovered that when the metal SrMnBi2 (a mixture of strontium, manganese, and bismuth) is exposed to strong magnetic fields it behaves a lot like graphene.

In the coverage I have seen thus far for the research, which was published in the American Physical Society’s journal Physical Review Letters, I haven’t seen what characteristics the SrMnBi2 mimics of graphene, but I imagine it has to do with electron mobility.

It seems the real focus of the research was to observe various metals under a high magnetic field rather than seeking a new graphene. But because SrMnBi2 can easily be doped with foreign atoms, the researchers believe that this may allow for creating new magnets or superconductors for the material. 

It will be interesting to see if anyone pursues the graphene angle, in which case instead of the “carbon nanotechnology revolution” maybe we’ll be talking about the “SrMnBi2 nanotechnology revolution.”

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The Transistor at 75

The past, present, and future of the modern world’s most important invention

2 min read
A photo of a birthday cake with 75 written on it.
Lisa Sheehan
LightGreen

Seventy-five years is a long time. It’s so long that most of us don’t remember a time before the transistor, and long enough for many engineers to have devoted entire careers to its use and development. In honor of this most important of technological achievements, this issue’s package of articles explores the transistor’s historical journey and potential future.

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