So what exactly is a Weyl fermion? Although we're often taught in high school science that the Universe is made up of atoms, from a particle physics point of view, everything is actually made up of fermions and bosons. Put very simply, fermions are the building blocks that make up all matter, such as electrons, and bosons are the things that carry force, such as photons.
Electrons are the backbone of today's electronics, and while they carry charge pretty well, they also have the tendency to bounce into each other and scatter, losing energy and producing heat. But back in 1929, a German physicist called Hermann Weyl theorised that a massless fermion must exist, that could carry charge far more efficiently than regular electrons.
And now the team at Princeton has shown that they do indeed exist. In fact, they've shown that in a test medium, Weyl electrons can carry charge at least 1,000 times faster than electrons in ordinary semiconductors, and twice as fast as inside wonder-material graphene.
Most notably, it might we be possible to build better ways to produce them en masse for further study. The strange monopole arrangement they express is still puzzling scientists, but applications may abound:
What's particularly cool about the discovery is that the researchers found the Weyl fermion in a synthetic crystal in the lab, unlike most other particle discoveries, such as the famous Higgs boson, which are only observed in the aftermath of particle collisions. This means that the research is easily reproducible, and scientists will be able to immediately begin figuring out how to use the Weyl fermion in electronics.
(Score: 2) by bd on Tuesday July 28 2015, @09:55AM
Well, considering that materials such as metals and semiconductors are crystals (metals are crystals up to the grain boundary), I would guess crystalline
based circuitry is not too strange a thing. Of course, transparent crystals such as gem stones have a large band gap and are therefore insulators, not
the best material to make circuits with.