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