Helical Dirac fermion

A Helical Dirac fermion is a charge carrier that behaves as a massless relativistic particle with its intrinsic spin locked to its translational momentum.

References

Hsieh, D.; et al. (July 2009). "A tunable topological insulator in the spin helical Dirac transport regime". Nature. 460 (7259): 1101–5. Bibcode:2009Natur.460.1101H. PMID 19620959. arXiv:1001.1590 . doi:10.1038/nature08234.

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