Helical Dirac fermion
Encyclopedia
A Helical Dirac fermion is a charge carrier that behaves as massless relativistic particle with its intrinsic spin
locked to its translational momentum.
Spin (physics)
In quantum mechanics and particle physics, spin is a fundamental characteristic property of elementary particles, composite particles , and atomic nuclei.It is worth noting that the intrinsic property of subatomic particles called spin and discussed in this article, is related in some small ways,...
locked to its translational momentum.